So I didn't post any unsolicited bunker pic in a while.
1y 10mon ago by sopuli.xyz/u/plactagonic in bicycle_touring from sopuli.xyz
~50 km away another (same type) bike for comparison

And small earlier type (~1936)

Location? Background? History?
Bingo!
Both of them are museums now. In a post is MJ-S 3 Zahrada, and in text is MJ-S 15 Závora.
They weren't finished before war and were completed in 50's and used until 90's.
Right now I sit next to this sneaky one.

Thanks, I unfortunately didn't thought that I will ride this route (last minute change of plans) so I couldn't go inside.