Horse Drawn Polish Biedka wz.33 with CKM wz.30
The Biedka wz.33 was a two wheel carriage, typically horse drawn, used for moving light and heavy machines guns, light infantry mortars, supplies, communication equipment or ammunition. It could be drawn by a single horse.
The Polish 81mm wz.31 Mortar was a French design refining the British Stokes design. The mortar was designed for a 3 man crew and could fire 3 types of rounds - high explosive, incendiary and smoke.