I am in the process filling out a variation to put my Martini Henry (currently held on sec 58) on to my ticket. The trouble is I can't find the serial number.

Usually they are a 4 digit serial number prefixed by one or two letters. Sometimes serial numbers can be found on the rear sight leaf. Another place is on the receiver but it is hidden underneath the stock forend, which I don't really want to remove.

Anyone else had this problem?

Has anyone put a obsolete calibre rifle on thier ticket without a serial number?