Anyone know what these first two connectors are called? Found this old looking board on a top shelf in a theatre I'm working at. : r/techtheatre

The Battalion: January 25, 2010 by The Battalion - Issuu

Boxoffice-November.26.1949

What is this Mezzanine/Board to Board connector? : r/AskElectronics

The Lord of the Rings

The Techi Bible: The Old Testament

Glossary of Technical Theatre Terms - Stage Management

Technical Theatre Reddit

Completion : r/techtheatre

Just found at the scrap yard. ITT stack with a monster 3 head tape deck : r /vintageaudio

Can I use a home theater sound system as a PA for live music? - Quora