vintage Standard Projector filmstrip Model 333-CD complete w/ instructions

Vintage film strip projector model #333-CD labeled Standard Projector and Equipment, Chicago 48 Illinois (1940s or early 50s?). This is complete in the original box with bulb and and instructions as shown.

The box is worn, but this set is clean and nice, and I don't believe the projector has ever been used - though it seems to work just fine.