Omega® Case Back Gasket ("Sans Fil" polyurethane), inside diameter 27.76 mm, outside diameter 29.00 mm, see all case numbers in description Height 1.75 - 1.99 Genuine Omega® crown wheel with

Genuine Omega® crown wheel with crown wheel ring

height of crown 4

Cratex abrasives can be shaped with conventional wheel dressers and do not harden or soften during use or storage

Double cut

Omega® Case Back Gasket ("Sans Fil" polyurethane), inside diameter 27.76 mm, outside diameter 29.00 mm, see all case numbers in description Height 1.75 - 1.99 Genuine Omega® crown wheel withOmega Case Back Gasket ("Sans Fil" polyurethane), inside diameter 27. 76 mm, outside diameter 29. 00 mm, see all case numbers in description Case Back Gasket Round "Sans Fil" polyurethane, inside diameter 27. 76 mm, outside diameter 29. 00 mm, height 1. 00 mm, to fit Omega case numbers: 7443, 1660277, 1660281, 1960078, 1960105, 1960189, 1960195, 1960261, 1960232, 1967443, 1920036, 1920037, 1980111, 1980114, 1980117, 3920005, 3980852 *Perrin Supply Ltd