Russian "short" flatcar 1:87 (H0)

Typical russian flatcar with frame of standard boxcar. It was also standardized in 1875, but service showed that it's size was insufficient, and in 1892 it was replaced with "long" flatcar. Most built had two axles, very few had three.
With resin printer You can use these wheels, buffers etc.:
https://www.thingiverse.com/thing:6407933
https://www.thingiverse.com/thing:6290121
https://www.thingiverse.com/thing:6217605
https://www.thingiverse.com/thing:6186828