"Sometimes things that are not true are included in Wikipedia. While at first glance that may appear like a very great problem for Wikipedia, in reality is it not. In fact, it's a good thing." - Wikipedia.
That may be what they are; it's difficult to tell. From what we can see , some details are evident. The absence of recoil housing suggest they are not QF systems . The trails are carried by axle trunnions (rather than seated limbers) consistant with French heavy artillery of the deBange design. However, the large splinter shields resemble the smaller Krupp offerings during the post Balkan War period. ( These were provided to users of their earlier C73 series of guns as up-dates, and photo evidence shows them installed on Rumanian C73/88s.) Note how the wide shields hide the wheels completely, and have no provision for a tube elevation slide. Yes, I would suspect SASH is correct, and they are either Schneider, or deBange 120mm pieces.
Thanks, gents. I can't get over how massive the shields are, taller than a man on horseback.
__________________
"Sometimes things that are not true are included in Wikipedia. While at first glance that may appear like a very great problem for Wikipedia, in reality is it not. In fact, it's a good thing." - Wikipedia.
I double checked the Romanian artillery inventory, and they do not seem to have had any Schneider 120mm L/28 guns (Bulgaria and Serbia, however, did apparently have 24 and 16 of these weapons respectively). They do, however, seem to have had on hand 32 "matériel de 120 long Mle. 1878 de Bange" as part of their siege train. Incidentally, the French on occasion fitted shields to some of their 120L Mle. 1878s, but it did not overlap the wheels like the ones in the photo. So, back to the drawing board. Perhaps we are looking at a Krupp 120mm "ring-rohr" type gun?