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For info on How to use the controls on the Texas Star 667 go here: www.texasstar.com/CWmed.html
As for the Board number, should be a EPT 3600 something(10-A, 10-z,11-z etc) you should be able to find that number printed on the board on both radios.
Open both radios up and look, it will be real clear if they are the same main board.
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