Used Grayhill Rotary Switch 1 Pole 3 Throw or 1P3T / SPTT.  Tested and Confirmed Working.  71B30-01-1-3S / 71B30-01-1-03S.

These have Shorting Type Contacts = Make before Break. Be certain this will not cause undesirable operation in your circuit.

Attempting to decode one for this part I came up with:
71B30-01-1-3S  Series 71 1/4" Shaft Standard Solder Lugs 30 degree angle of Throw 1 Deck 3 Poles Shorting and 3 positions. -unverified information.  The BS Version has an internal seal on the shaft.

High Quality Made in USA Industrial Switch with Gold plated terminals.  Don't confuse these with cheap phenolic open deck style switches.  These are real ones.

115VAC 250mA or 30VDC max.  Rated for more current with reduced cycle life -see datasheet for info.   MSRP new ~$28

Scuffs Scratches Marks Oxidation and Wear.  Previously Soldered.  Comes with a mounting nut and a washer.

Datasheet pages shown are NOT included shown for reference ONLY.