I have for sale, from my private collection, an Omega Speedmaster Stainless Steel Omega Crown - Part no. 069ST43069 - which is brand new and still sealed in its original Omega packaging.
This crown will fit the 105.012, 145.012 & 145.022 Speedmaster models.
Parts like these are very hard to source these days but I have been collecting Omega parts for many years now and I am now downsizing my considerable collection.
Please feel free to ask any questions.