it carries a set of 1905-24 era proofs that include the 13/1 marking - that equates to bores at .719 (or thereabouts).
the second set of proofs are from the 1954-89 era (3 TONS PER []"). the reason it was submitted for reproof is revealed by the markings of the later bore sizing at .729.
the bores have been honed to clear them of pitting/damage, and as a result the gun was out of proof. hence, it required reproof to allow it to be sold under english regulations.
best regards,
tom
Last edited by graybeardtmm3; 02/19/20 08:42 PM.