Help with Steel Crown for St. Christopher, Ref 2041, Cal. 23.4

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Dear Respectable Members

I recently purchased a St. Christopher, Case Ref. 2041, Cal. 23.4 but it has the wrong crown. I'm looking for a replacement steel crown. I believe the crown should have 22 'teeth'/notches like the image shown below.



Most grateful if anyone could guide me on the outside diameter (A), outside diameter of the case tube (B), thread size (C) and crown height (D) and where I might possibly be able to source one?



Many thanks and most appreciative of your help.