Hope somebody can help me with finding them and perhaps we can at least try to make kind of database. I acquired a 22409 without crown and hope someone can help me find a decent replacement. Originals are very rare and due to the specific shape replacements are not a walk in the park as well.

Attached some pics of the - what I think is an original - crown of my 224105. So: diameter 6.7mm and depth 2
5mm. Anyone a pointer?

 

I know my Railrouter Chronometre doesn't have an original crown. I would like to get a rplacement but have no idea what the specs are. Signed and domed (starting slightly in from the edge).

 

Hey mark maybe this will help.
https://www.ebay.com/itm/265063100649Purchases made through these links may earn this site a commission from the eBay Partner Network

 

I don't have a spillman on hand to check the crown specs. I would think it's not the easiest crown to find. The only advantage is it's unsigned, and was used across many brands, so it could be sourced anywhere potentially.