FENDER Pure Vintage '70s Bass Tuners (New, Unused) Fender Pure Vintage '70s Tuning Machine bass tuners, purchased new from S.H. The bushing size is believed to be 17.4mm. This is because it's loose for GOTOH FB30's 17.6mm hole diameter. The tuner shape is the cloverleaf design made by Schaller, adopted after 1976. I'm selling these because the hole size for the headstock bushings doesn't fit mine (S.H.'s return period has expired). New and unused. The last photo is of the official product in use.