Bottom seal to block the case back, for OMEGA SPEEDMASTER AUTOMATIC “REDUCED”. The outer diameter of the joint is 32 mm, the inner diameter 30.84. CONDITIONS OF SALE Paypal: I offer you the possibility to pay by Paypal, please contact me at 06 75 86 37 50 for all your questions. ATTENTION Also note, for new ebayers, items will be sent only after payment has been received, no cash on delivery possible, thank you for your understanding. If you would like any further information or photos, please feel free to contact me any day: Eric BALDIN “Oh Heart of Time…”.