258 WW by Elora of Germany. For inside and outside threads of type (BSW) British Standard Whitworthand (BSF) British Standard Fine. Quality Made in Germany.
British Whitworth Thread Restore File Germany
Triumph Norton BSA etc Whitworth Thread Pitch Gauge 4-84 TPI PN# TBS-4158
V-Coil 1/4" Whitworth Thread Repair kit BSW 1/4 x 20 Helicoil Compatible
Lang Metric Rethreading Tap Set Thread Restore 6pc 6-12mm Made in USA
Lang NC SAE Rethreading Tap Set Thread Restore 6pc 1/4"-20 to 9/16"-12 USA Made
Lang 48pc Tap Die File Rethreading Set Metric NF-SAE NC-USS Thread Restore 971
