Here are 4 pieces of Russian ordnance. Foreground right is a "Unicorn" howitzer. Propably the most famous of Russian guns during the 7YW. Scale for all seems to be a bit larger then for 30 mm. I purchased them at this years Kulmbach/Germany convention in August. No idea what foundry they are, but they are very well done casts. Distributer is a certain A. Fingrut, a Russian located in Pforzheim/Germany. Foreground left is an early 7YW 3-pdr regimental cannon with it's distinctive 2 Cohorn type 6-pdr mortars fixed to it's "fork-carriage" that does not require a limber. It had a 2-horse draught. Background left is a 12-pdr cannon and right is to be a heavy half pud Russian scale howitzer which would approx. resemble a German 16-pdr or French/English 8 inch class howitzer . The barrel, though, is a spare piece from an English foundry, but should do o.k. In the rear of the image, I have placed an Austrian 6-pdr "Falcon" of the innovative 1753 Feuerstein ordnance with 2 cannoniers to get a feel for the scales.
Close up view of the ‘Unicorn', which I take to be the 8-pdr piece. The carriage seems to be somewhat oversized, though. Wheels are o.k.