Eterna® Waterproof Crown CN-ETER19 kieninger clock chain & chain wheels Replacement Tap 0-80NF is used

Replacement Tap 0-80NF is used to cut threads to either clean or dress the inner part of a steel shaft

Omega® Steel Waterproof Crown to fit Omega® caliber 420

Uni-Polish Clockwise System Vice with Allen Key for the clockwise (right-turning) Uni-Polishing Systems 67-23501 and 67-23504

Jaeger LeCoultre® yoke spring

Eterna® Waterproof Crown CN-ETER19 kieninger clock chain & chain wheels Replacement Tap 0-80NF is usedEterna Waterproof Crown CN ETER19 steel, domed top with 5 knurls, 5 dots, outside diameter of crown 5. 00 mm, outside diameter of case tube 2. 50 mm, height of crown only 2. 50 mm, total height of crown 2. 50 mm, tap 0. 90 mm * Perrin Supply Ltd is independent of and not affiliated with or sponsored by Eterna. Eterna warranty does not apply to parts supplied by Perrin Supply Ltd. Using generic crystals may devalue your watch.