I tried tin castles ... very interesting search.
That turned into a search of biscuit tin castles ... wish I knew about them as a kid. At holiday time the biscuit companies would break out the biscuit castle tins with tin walls that you could connect and build your own castles.
The castles seem to always use large blocks, this one has bricks.
Tried tin buildings, which turned up saloons and banks and almost anything you could imagine.
Finally got lost in o'gage tin buildings with everything you could image including ones you hadn't even thought of.
Not much help, but, did learn there is an immense world of vintage tin buildings out there, and they're pretty cool.
The answer may be somewhere in all those o'gage train buildings.