Swedish dating rules
The mark was modified to that shown in Figure II, with D to the left representing 1953, and the B to the right identifying the Birmingham Proof House. Thus the year codes have hitherto been understood to be 1950 - A; 1951 - B; 1952 - C; 1953 - D; 1954 - E; 1955 - F; 1956 - G; 1957 - H; 1958 - J; and so on through to 1974 - Z; ................
we also believed that Q was then used in this series for 1965.
It may not be immediately obvious, but careful observation may provide you with the information for which you are looking.
There are a number of methods by which a rifle can be dated, or at least bracketed between certain years of manufacture.This is nothing new, and proof-house date marks from years past may still not indicate the rifle's date of manufacture. Such a purchase additionally supports such researchers and their work, and is, long term, to the benefit of us all.However, if an estimate of the rifle's age from other sources closely matches the date marks, then you probably have pinned down when it was made within a year or so. The ISBN numbers for these reference books are in the bibliography. When inspecting your rifle and comparing marks with reference sources, be careful not to confuse date marks, or "private view marks", with inspectors marks, which usually carry the factory identification, e.g., "E" for Enfield, under the sovereign's crown, below which is the inspector's identification number; usually two figures such as "39". rifles the Proof mark is only on the barrel (and on the action falling-block), and the third mark on the barrel is the 'NP' mark for Nitro-Proof, also below the crown.However, we have been made aware, by a contributor, of two contemporary rifles, a BSA Mk.II Lightweight Martini International and a BSA Century, that each carry what certainly appears to be the letter "I" in the left quadrant (as in Fig. This would suggest that "I" as well as "Q" was no longer deemed to be ambiguous, as had previously been the case with the Fig.1 stamp configuration.
The two markings are shown below, the International to the left, and Century to the right.