This is a Single Vintage CTS 1966 Solid Shaft 500K Fender Guitar Potentiometer.Date Codes date to 1966,137 6617, the 17th week of 1966.Reads 530.05K on my meter(pictured)..Great for restoring 1960s Fender guitars and Basses,and some Rickenbackers.Please look at all the pictures.Sold As Is.No Returns.All Sales Final.Buyer pays shipping,thanks