Jaeger-LeCoultre® 402, 427, 496, 8NR, 8RF, 8RFO Steel Back-wind Crown with Square Hole CN-LC41 Rolex® 1210 Rathburn Ring Stretcher Ring is

Rathburn Ring Stretcher Ring is placed on stretcher and the gentle tapping with the mandrel causes ring to expand

60 mm in diameter with a height of 3

A great "how to" video included

Slim-Line Midget Nippers For flush-cutting wires less than

Jaeger-LeCoultre® 402, 427, 496, 8NR, 8RF, 8RFO Steel Back-wind Crown with Square Hole CN-LC41 Rolex® 1210 Rathburn Ring Stretcher Ring isJaeger LeCoultre 402, 427, 496, 8NR, 8RF, 8RFO Steel Back wind Crown with Square Hole CN LC41 LeCoultre 402, 427, 496, 8NR, 8RF, 8RFO, steel backwind crown with square hole, diameter 7. 55 mm * Perrin Supply Ltd is independent of and not affiliated with or sponsored by Jaeger LeCoultre. Jaeger LeCoultre warranty does not apply to parts supplied by Perrin Supply Ltd. Using generic crystals may devalue your watch.