You note the superior quality mark:
The superior quality stamp consists of two concentric circles and a large number "1" superimposed over them, with the whole underlined by two wavy lines.
That's actually a stylized letter "Q" with the "1" superimposed, i.e. "1st Quality" or "Quality 1". That mark was reserved for guns that were deemed to have sufficient quality to be exported. During Socialism, hard currency from Western countries was something the government needed. So, making sure the reputation of their [few] export items remained good was a high priority. Thus, the Q1 mark was rather carefully applied and still has weight.
You've got a nice gun there. If was to go over to O/Us, I'd be looking for one.
