Motorcycle platoon on Harley-Davidson JD-1200 with sidecar armed with Hotchkiss wz. 14 heavy machine gun from 1932.

Photo by Witczak-Witaczyński Narcyz.
Thanks Shas!

Vehicles from the 4th Squadron Armored from Brest assigned to the 2nd Cavalry Division for the duration of maneuvers. commanded by the legendary Bolesław Wieniawa-Długoszowski.

The aforementioned the maneuvers from which this photo was taken took place between 10 August and 8 September 1932 on the territory of the Mordy estate in Siedlce County,  book page 34

Thanks Marcin!