ISO Berthoud H91 decaleur

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Greetings-

I am looking to purchase a Berthoud H91 decaleur and thought I would check here for a used one.  I was given a GB decaleur that I thought was for a horizontal stem bolt, but it was actually for a vertical bolt.  So, alternatively, if anyone would like to exchange the vertical bolt cylinder piece and bolt for the threaded cylinder piece and horizontal bolt, that would be great too.

Best regards,

Matt