Probably linoleum with a carpet square in the middle. I remember where we lived in the 1940's to early '50s (behind and above my aunt's hairdressing salon- outside khazi, tin bath on the nail outside, copper boiler in the kitchen,only gaslight in my bedroom but electric downstairs) Dad concreted the living-room floor 'cause the floorboards were rotten and then painted it green with something called "liquid lino". I remember having to walk on planks raised on bricks while it dried! I still have my ID card somewhere, but no ration book!
RtS (war baby)