Heuer® (Stopwatch) Round Timer Crown CN-HEUER12
round / steel, diameter 9.50 mm, opening 6.20 mm, height 7.00 mm, 900 round timer crown model # ??
* H. & W. Perrin Company Limited is independent of and not affiliated with or sponsored by Heuer®. Heuer® warranty does not apply to parts supplied by H. & W. Perrin Company Limited. Using generic crystals may devalue your watch.