Binoculars made in Russia and the USSR (1 Viewer)

[shsohrab]

Hello
I have a question about binoculars made in Russia and the USSR.
Most binoculars made in Russia and the Soviet Union have a special acronym engraved or printed on them, and these acronyms are not the same.
for example:
I know that
Б = B Binocular
П = P Prismatic
Ц = C Central Focus
The number has also been added to the БПЦ Such as 1, 2, 4, 5 and 6.
But my question is what do these numbers mean and what are the differences between these numbers?
I am sending pictures of some ZOMZ binoculars with this letter
Thank you very much

 

[Binastro]

Different model numbers in chronological order.

The first 12x40s had larger more complex eyepieces with better correction.

Almost 6 degree field.

B.

 

[richard866945]

Different model numbers in chronological order.

The first 12x40s had larger more complex eyepieces with better correction.

Almost 6 degree field.

B.

and did you know that many Russian optical instruments had a serial number with the first two numbers indicating the year of manufacture.