[Repeater-Builder] (unknown)

[Doug Dickinson]

The CH751 key is a generic cabinet key used by many manufacturers including 
Square D, Soundolier, and other non-radio manufacturers. The 2135 and 2553 are 
pure Motorola, reserved by Chicago Lock (the manufacturer) for only Motorola. 
The BF-10A key is pure GE as is the GE1000 key. THere are others for some of 
the 
other radio folks, but all of them used variations depending on the purchaser 
(Fed Govt was sometime different keying). All in all, a tech neeeds a very 
large 
key ring to open "everything".