Help Officer rank stars 70's -80's

[Euronymous]

Hello

I noticed that some rank stars are not always 100% identical. Is it just due to the manufacturing process beyond the years ? Please see my photos, stars on the left are more rounded while the ones on the right are a bit flatened.

 

[Bayern]

Manufacture is not uniform , the quality variable ,material employed also .

[chechaco1]

Stars of this type were used from the mid-1950s to the mid-90s, multi-million copies of various productions. It's all right, don't doubt it. To look for nuances in them is a thankless task, there were bags in the stores of the military trade. And they molded what they had on a pile of uniforms, and they rolled them over from the old shoulder straps,and bought new ones. The Soviet Army did not pay attention to this - to the multicolored appearance and so on. Regular hardware.