shank diameter is 8
OM-088NS5031 (replacement for 0880406N
supplied with a threaded collar dia
one at 6 o'clock position (second hand) and one at 10 o'clock position (60 minute timer)
Available in 3 grit textures
Omega® Crown (Waterproof, with center pusher), yellow, fits tube 090ST4132, see all case numbers in description clock dial parts shank diameter is 8Omega Crown (Waterproof, with center pusher), yellow, fits tube 090ST4132, see all case numbers in description Omega Yellow Waterproof Crown with center pusher (corrector), diameter 4. 50 mm, fits tube 2. 20 mm, total height 4. 70 mm, tap 1. 00 mm, fits tube 090ST4132. Fits Omega case numbers: 10447981, 1910050, 1920020, 1960050, 3960838, 5960003, 5960004, 6866342, 7960805 *Perrin Supply Ltd is independent of and not affiliated with or sponsored by