Dear members,

I am trying to figure out what this tube is for. Removed from its NOS packaging a few days back, for my BC. I noticed the tube is taller and it looks to have a groove for an external washer. Most importantly, it won't take a Brevet crown.

Any ideas what crown goes with this please? Thanks in advance, h


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for my Panerai 6154 they had a devil of a job matching it up as there are ( contrary to popular belief) about 7-8 variants of the 8mm brevet BC ...and they had to rummage through all until they sorted it and found the correct one....most of which they still have.

and charged me a right royal less than 10gbp for the privilege.

gosh darn it, cause NONE of my half dozen crowns fit

Makes sense why nothing I have seem to work on it