not sure if it’s possible to identify by picture only. Size is approximately 6.80 x 3.90 (right on top of the logo) and case tube size is 2.50. Not sure on stem size though. Any leads on part number or which model/cases it goes to. Thank you.
From a previous thread on crowns (there are many): Gemini4 said ""remember the the 24 point flat foot crowns came in at least 3 flavors: 1.0mm stem = 321 movement for Speedmaster 1.2mm stem = 284, 285, 286 movement for 2914, 135.004 Railmaster 0.9mm stem = 501, 552, 565 movement for 2913.14755.165.X, 166.X Seamasters Luckily, watchmakers can adapt an incorrect stem size."" td69 said ""Aside from having the different stem sizes, the height of the crown is varied as well. The correct A1 flat foot crown for 321 Speedmaster should be 3.8mm in height or thickness however you call it compared to 3.0mm for some of that of 2913/2914 on Railmaster and Seamaster, while sharing the same 6.75mm in diameter."" https://omegaforums.net/threads/new-member-ed-white-crown-question.60131/#post-748493