Standard Comm. GE MAST EX 2 Radio Frequency Crystal Transmit T 451.8000 MHz

Not sure if these are NOS or used. I have a huge box of various crystals from a local radio shop that closed. I don't know much about them other than what's on the crystal or the envelope they are in. 

I will consider offers if you are buying multiples.

Parts Card will ship with last crystal