I don't have mine open at the time, so I am going from memory and the docs. It is actually a double-pole quad-throw (DP4T) switch.
The MPN is?SBU2044N(10)-R15, but I can't find any information online on it.
That is all I got w/o cracking my unit open. I've had the shaft out when working on the RF board, but I can't recall the mechanical details.
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-Mat Breton, N8TW