The photos I have seen of Mk III males, and there aren't many, show that they had the early type sponson so there should be no chance of confusion between a Mk III and IV. If, however, there is a photo supposed to be of a Mk III with a Mk IV style sponson, you can pick the difference at the front by the Mk III having the same uneven rivet pattern on the cab roof edge as the Mk II. If the photo is of the rear of the tank, the Mk III has no external fuel tank. If the photo shows the roof, the Mk III had no silencer. If the photo is of the underside of the tank, the cameraman was too slow.
P.S.: The roof box is also a distinguishing feature of the Mk IV.
P.P.S: Not forgetting the mounting points for the unditching rails.
There are some photos at ML posted by Phil R that show the Ashford Mk IV female tank. The rear shot shows the fuel tank is missing, possibly leading someone to confuse it with a Mk III female. It looks as though the rear plate is a more recent replacement as where the rear door should be is a blank plate. All the other features common to the Mk IV are there.
Those are great sketches, you wouldn't by chance have a comprehensive set for any of the marks would you? Something to scale perhaps? I am trying to compile/ create/ draft a set of scaled drawing which I could possibly build a model from.
Serial numbers noted as 601 - 625 and 801 - 825, but I want toget moreaccurate information.
-- Edited by Alpha Six on Monday 12th of December 2016 01:00:25 PM
Hi
I'm a bit puzzled by what is meant by "more accurate information", as this information is accurate. Â Mark III Females were numbered 601 to 625 and Males 801 to 825. Â Don't be confused by tanks such as 803, the Worksop presentation tank or 815 the Ashton-under-Lyne presentation tank. Â These are Mark III Males fitted with Female sponsons. (Nine years on, I know a lot more than when I started this thread!)
"More accurate information" - it's my bad English. Maybe I was supposed to write "more detailed information"?
I mean, I did not see any pictures, which would display the serial number. What do you think, why is so little known photos of the Mk.III? 50 pieces it's not a small series, is the same as Mk.II.
We know a few pictures, but for some reason we are sure that they depicted Mk.III, as we think, not Mk.II with late female sponsons?
All Mark IIs went to France with the exception of a few used for experimental purposes. You see Mark II tanks in France with Mark I sponsons but never Mark IIs with late Mark III Female sponsons. No Mark IIIs and no Mark III sponsons went to France, at least not so far as I know.
You do see photos of Mark IIIs with their serial numbers painted but sometimes you can't see them or they're not there, just like Mark IVs.
I think that 50 tanks is quite a small series and as they didn't see action they didn't get photographed often, except those few used as presentation tanks.
Excellent picture, Gwyn, thank you. I have many questions and ideas about Mk.III, but I can not tell it in English as detailed as I would like, unfortunately, but I will try.
I think that 50 tanks is quite a small series and as they didn't see action they didn't get photographed often, except those few used as presentation tanks.
I understandyour point.However,there is alsothe oppositeargument. The lifetime ofMk.IIin Francewas notlong,it is clear,and retaineda lot of it images. However,trainingtanks whatconsideredMk.III, as Ithink,should have beento existfor much longer andalsobe fixedin manyphotographsin various stages: during manufacturing,during exercise,duringrecycling. So,50 piecesisquite a lot. My mainquestion is:is it absolutelyaccurate andconfirmed informationthat50 tankswere produced?Is it possiblethat there50Â serial numbers were reserved, butmademuch less?
I got interested inthe differences between Mk.III and Mk.II hulls. Usuallyit indicates thata circularcut-out infront of the cabfor MG ball mount and morethicker mildnot tempered steel plates. But I donot understand whya softbodyarmorto dothicker, especially fortrainingtanks?It isin any case willbreakanybulletsandtanksfortrainingat alldoes not matter.
You see Mark II tanks in France with Mark I sponsons but never Mark IIs with late Mark III Female sponsons.
But Iknow of at leastone photo,whichdepictsMk.II numbered 81 with this female sponson,notin France, of course.Do youknow thispicture?
-- Edited by Alpha Six on Wednesday 14th of December 2016 10:17:12 AM
This is an interesting question. Certainly it is the case that serial numbers were allocated to Mark V**, VIII and IX and the tanks not built. At the present time I see no clear reason to think that the Mark III order was terminated before completion. I would expect to see something in records I'm presently studying as Metropolitan would have insisted on some kind of compensation, and I have found nothing - yet. Nevertheless this is relevant to my present researches and so I shall keep an open mind and look for evidence.
The Mark III was a gradual improvement on the earlier types but still not considered good enough for fighting. Â The impression I have is that it was designed for battle, but once built relegated to training. Â This may have been because the Mark IV was such a big improvement. Â I am not clear whether all Mark IIIs were built with mild steel plate, or only some.
The picture you refer to is attached. Â It is very difficult to say from this side view whether the hull (ignoring the sponsons for the moment) is those of a Mark II or a Mark III. Â There are simply no differences visible. Â The sponsons are definitely late Mark III, so without any other indication I'd say it was a Mark III. Â However there is a number, 591, on the side doors and a partial serial is visible that appears to be 59x, quite possibly 591. Â We know that Mark II Female 591 never went to France so what we have here could well be a Mark II hull with Mark III sponsons - well done!
Gwyn
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-- Edited by Gwyn Evans on Wednesday 14th of December 2016 10:09:05 PM
The MKIII is one of those marks of WW1 Tanks I am still very unsure off. I believe but don't have the access to photos I can trust to be totally what they say they are, that the MKIII had even spacing of it's rivets around the edge of the front & rear horns. As in the MKIVs. But had the same top to bottom rivet spacing as the MKIIs, which is one less on the MKI&II than on the MKIV.
Can anyone confirm this one way or the other?
Helen x
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-- Edited by MK1 Nut on Thursday 15th of December 2016 11:31:47 AM
Could I just check my understanding of your comment, before I run off to count rivets? I'll focus on the front horns, of which I have better photos. When you say the spacing of rivets around the edge of the horn, I take it you're looking at the outer horn, and not the inner? Then I assume I'm looking at Part D which is the L-section structural steel that runs from the front switch plate, curves around the edge of the front horns and then continues rearwards ending below the cab (looking square on)? If so, on which part of Part D am I to count the rivets? Is it the whole of the Part, or just a part of it?
Then, when you say the same top to bottom rivet spacing as the Mark IIs, do you mean the top rivets are vertically above the bottom rivets?
Yeah it's not easy to explain... sooo... photoshop time! :)
Basically on the MK1 tank they reduced the number of rivets and played with the spacing all over the tank. It was probably a way of saving construction time while not effecting greatly the strength of the hull. On the MKIV they seemed to have tidied everything up and gone for a more even and closer rivet spacing than seen on the earlier marks of tanks.
The MKIII is incredibly hard to spot and I am hoping that they have a mixture of the wider spacing on the main body plates of the MK1&II, with the narrow rivet spacing around the horn edging of the MKIV.
Here's two more photos. Both these are definitely, unquestionably Mark IIIs (although 815 is a Male with Female sponsons). You can see that where Part D bends around the front of the horn the rivets are tightly packed, but more evenly spaced as the steel straightens. Then on the joint between plate 10 and plate 11A there are three rivets, like the Mark II but unlike the Mark IV.
At the moment I'm having some difficulty working this out, so this post is just to give others something to work on while I go on puzzling (and doing a few other things I must do).Â
The picture you refer to is attached. Â It is very difficult to say from this side view whether the hull (ignoring the sponsons for the moment) is those of a Mark II or a Mark III. Â There are simply no differences visible. Â The sponsons are definitely late Mark III, so without any other indication I'd say it was a Mark III. Â However there is a number, 591, on the side doors and a partial serial is visible that appears to be 59x, quite possibly 591. Â We know that Mark II Female 591 never went to France so what we have here could well be a Mark II hull with Mark III sponsons - well done!
Gwyn
 Hello Gwyn, thank you for reply and your researches. Yes, I had meant it photo. Here it is in a larger size:
https://yadi.sk/i/PGC9ViUi34GYGV
I think that number 591 is decisive argument that would have to think that this is Mk2 hull.
What do you think that refers numbering above road wheels mounts?
Yes, the larger photo is much better and I agree this is a unusual case of a Mark II Female hull with Mark III Female sponsons.
I'm not sure what to make of the white marks above the positions of the road rollers. I'm not sure whether they are numbers or something else. Another interesting point is that someone has painted their right hand (red?) and pressed it against the hull - look at the top half of the number eight.
I'm sure somewhere I have seen a photo of what I think was a MKIV being assembled in a factory, with all its rollers and wheels yet to be fitted. This tank had similar numbering above the roller holes and on different parts of the side plates. Could this tank simply be showing it was rolled straight out of the factory for testing?
It's just an idea, unfortunately I can't seem to find the photo to see if I'm remembering it correctly.