7.62x54R "17 6 46"

Normally Soviet ammo has 12 o’clock - 6 o’clock headstamp arrangement. Why is this Barnaul different? One would assume that in the rigid Soviet military all headstamps were assigned in the same way by one office. Obviously it is not so. Why?

Vlad, the 3rd position is just a lot number as since late WW2 output was so high that they needed means to ID different lots. One would think that this was important for QA.
As per what I have seen the lot number was dropped again in 1946.
Use is observed on 7.62x25, 7.62x54R and 14.5x114.
On 7.62x25 you also can find Roman numericals for the lot ID. Some for the month and some have what appears to be trimesters (factory #304).
Not all manufacturers used lot numbers.

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