Need help identifying font

I need to make some laser engraved safety plates at work and this font really pops from a human readable perspective. Does anyone have an idea of what it might be called? For reference this photo is of a service hatch on the main F1 engine for the Apollo space program.

I need to make some laser engraved safety plates at work and this font really pops from a human readable perspective. Does anyone have an idea of what it might be called? For reference this photo is of a service hatch on the main F1 engine for the Apollo space program.