Arsenal 636 marking?

[RoscoeTurner]

Purchased this SKS today, the arsenal marking looks like a cross between the 636A and 636B examples in the arsenal marking chart.  The right 6 has a base like the 636A drawing and the left like that of 636B.  Has this been reported in the past?

[running-man]

It appears that year 22 /636\ guns generally have a version of this stamp like yours shows with the atypical stamp.  I'm honestly not even sure where the A and B versions come from, in my files I only track them as /636\ with no distinction.  Here's a grouping of them, I can't make out a definite A vs B or a transition year (maybe the second year 14 gun??? But then I have many other year 14s that show sharp corners on the 6's).

Year 13:



Year14:




Year 16:



Year 17:





Year 18:



Year 22:



Years 26:





LC will have to comment on it as I believe he was the one that coded them as A or B.

[RoscoeTurner]

Thank you for sharing those photos, it is very interesting seeing the variety.