Pin Gauge Set,Range 0.1-6.00mm,51/91/99/101pcs,Step 0.01/0.05mm,Precision Steel,Customized Pin Gage for Carpentry and Inspection
Aliexpress UK
Made of Bakelite. The 54 P Bass is narrower than the 51 version.
eBay
PRESICION 51 BASS. FENDER GUITARS. UNDER THE DIRECTION OF CLARENCE LEONIDAS FENDER. Rickenbaker, Les Paul & Leo Fender. THIS IS THE FIRST FAMOUS AD OF THE AD was left original as was. I take pride in what I do.
eBay