Hi OF, For sale is my lightly used Spiralwinder Version 2 (slim) sapphire caseback for the Omega Speedmaster. Included in this sale is the caseback and rubber gasket, which acts as the movement spacer. This caseback is slimmer than the OEM caseback and will reduce the height of the watch while on the wrist. You can read my review of this caseback, here. This caseback has had great success with FOIS height reduction, as shown in this thread here. This caseback is in great condition. No tool marks/scratches or damage. In very bright direct light I can see super fine superficial marks here and there possibly from me rubbing a cloth/shirt against it to clean it. These faint marks are hard to see otherwise. The sapphire is clean and clear. I cannot personally guarantee fitment, but this caseback is stated by Spiralwinder to fit: CK2915/CK2998 105.002/105.003 105.012/145.012/145.0012 145.022/145.0022 1861 Professional 3570.50 ck2998 FOIS Not for: 1957 Trilogy 3861 Speedmaster I am located in the US and I am asking $80 PayPal F&F with free shipping within the CONUS. No returns unless grossly misrepresented. Here are a couple reviews from the few things I have sold https://omegaforums.net/threads/scarecrow-boat.137377/ https://omegaforums.net/threads/scarecrow-boat-is-an-excellent-seller.136577/ https://omegaforums.net/threads/scarecrow-boat-is-a-great-seller.125526/ Here are the pics (pardon any dust). These images can be found on my review hyperlinked above. These images show how it looks on a Speedy and how different it is to a Thomas Priek version.