Plastic Thumb Rest Finger Rest for Fender Precision Bass and Jazz Bass
Added a thumb rest. Template with it shows the placement I used, other basses show it below the strings. Fender OEM part. Why different placements? : r/fender
1980 Precision Bass ad. Love the brass thumb rest on this Baby. | Guitar, Fender bass, Fender bass guitar
What's the purpose of the Fender Precision Bass plastic thumb rest? - Quora
Clear Thumb Rest Ramp for Fender Jazz Basses Finger Ramp | Reverb