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6.5mm Omega crowns attributions

SerP
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Hello.

I bought some 6.5mm 24-tooth crowns a while back that I would like to define.
I done my homework and will share my attribution.
Please let me know if I am right or wrong in my assumptions.

The first pare has (diam 6.5)x3.35mm and X3.5mm in hight (pictures attached - sorry for the low quality of the shots).
I suppose both crowns to Speedmaster 145.022-69

IMG_20250111_171023.webp IMG_20250111_171036.webp IMG_20250111_171052.webp IMG_20250111_171059.webp
 
SerP
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Second pair is 6.5x3.4mm crowns, which I suppose should fits to SM300 and Ploprof :

IMG_20250111_171242.webp IMG_20250111_171307.webp IMG_20250111_171328.webp IMG_20250111_171333.webp
 
SerP
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Please, let me know your opinions, and one's sorry for such pictutres.. 🙄
 
speedb
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You need to check the tap size for the stem. A tap size of 0.9mm would fit a seamaster and 1.0mm would fit a speedmaster.

All I can contribute is that the crown on the top left is a likely a SM300 service crown due to the dimensions.

The lack of flat footed logos and later style of crimping makes me think all of these are crowns for later models or are service items.
 
SerP
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speedb speedb
You need to check the tap size for the stem. A tap size of 0.9mm would fit a seamaster and 1.0mm would fit a speedmaster.

All I can contribute is that the crown on the top left is a likely a SM300 service crown due to the dimensions.

The lack of flat footed logos and later style of crimping makes me think all of these are crowns for later models or are service items.
Thank you!
 
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