Two of mine are marked Imperial, the others are unmarked. Feel free to share your rubber gorillas here, I'd love to see them.
Those are splendid!
I have the imperial one to go along my Universal Monsters and Godzilla. I'm very fond of big clunky gorillas as everyone can be seen as a King Kong figure
Here some from my collection, not rubber but fun nevertless!
Windup King Kong vs Godzilla - the set also include a Creature from the Black Lagoon - which I found sometimes after I took this pic. The Godzilla is from my very early childhood (my parent bought him to me at a theme park), so I was glad to found back the two other monsters to go along:
Oooh I so want those walkers to go with my Creature from the Black Lagoon one (which, funnily enough I've had since childhood and was bought for me at a theme park) - also, Kinky Kong?.
Luckily those monster walker are not too hard to get by. I noticed (from mine) that they're two different sort of windup key: the short, round-pegged one (like the one on my Kong) and longer, tubular one with two "flaps". The later seems to be the oldest one, as anyway those kind of toys are often re-tooled and re-issued over the years.