On the "Reilly: History Chronology, Serial Number" line below, Wootang mentioned that in 1855 the UK mandated that bore size be stamped next to the barrel proofs.
However, there apparently were makers who were already stamping bore size before it was regulated. With Reilly's, there are not enough pre 1855 guns to establish how much of marker this regulation could be. An 1847 Reilly had no bore size marker. A December 1855 had it.
So what about other London and Birmingham gun makers? Can anyone look at SN chronology for other gun makers and see if the 1855 date marker....bore stamp...applies.
