Ring gauge in plastic with 6 diferents colors for watchmakers and jewellers

Tailles FR de 1 à 36, US de 1 à 15, circonférence de 41 à 76 mm et Ø de 13.0 à 24.2 mm

In plastic. Exact and of fine quality.
With rings of 6 groups with different colours No 1 - 6, 7 - 12, 13 - 18, 19 - 24, 25 - 30, 31 - 36,
to enable an easy indentification.
With 4 measurements:? French calibration 1 - 36
? Circumference in mm 41 - 76
? American calibration 1 - 15
? Diameter in mm 13.0 - 24.2

• Data sheet