Savoy electronics plug-in oscillator modules, probably fit motorola two way radio base station. I couldn't find much about the item, but RadioMuseum has this to say about Savoy
note to me, wooden crystal box 1
Savoy Electronics, Inc. (Bassett) Fort Lauderdale, Florida (August 1974)
Savoy Electronics, Inc. was owned by a non-US company and was incorporated in Florida on January 1, 1940. They produced crystals under the Savoy name and amateur antenna products under the trade name Bassett.