Now You got me looking.

Interestingly enough although posters here attribute the rect/heart mold to the 50's

The Chip Rack lists two rcthrt chips at the Esquire Club in Fallon as being from 1941.

Also Hotel Nevada in Ely listed as being 1940s

And one from the Palace club in 1930's.

Now I'm confused again.

Can anyone confirm the dates for the Mold?