Mechanically, they all work great. The item "1969 Fender Jazz Precision Bass guitar TUNERS tuning machines complete set" is in sale since Saturday, November 12, 2016. This item is in the category "Musical Instruments & Gear\Vintage Musical Instruments\Vintage Guitars & Basses\Bass Guitars". The seller is "studiogallerywrightatmacd0tc0m" and is located in Denver, Colorado. This item can be shipped worldwide.