The brand you said "should be" Russian, an older brand. But this brand, on the market, is mostly fake, that is, domestic inferior products, and all of them are labeled indiscriminately.
These numbers and letters, if interpreted literally, are 50 times and the caliber is 50 mm, so it is impossible for a hand-held telescope to have such specifications. The following parameters should have marked the field of view, but this marking is also random, not formal and accurate. Speaking of which, maybe you also know the conclusion. But I don't advise you to be too discouraged.
At present, there are many fakes in the market, accounting for more than 90%, and there are all kinds of false propaganda, such as "night vision", "infrared", "Japanese cherry blossoms" and "Russia". You can learn the basics:/zhishi07jibangangshiyujianbie.html.
Pay special attention to multiplication, military, night vision and other issues. , which is to introduce some common false propaganda.
If you have already bought it. . Don't be too sad, there are too many fake and shoddy products now, and too many people are fooled. . . Basically, I have never been exposed to telescopes, and people who buy telescopes for the first time have had such experiences and lessons. . So, I think this is normal. This is not your problem.
Secondly, correct a common misunderstanding.
Why were Russian telescopes so hot nearly 20 years ago? The reason is simple-because it is cheap! !
As early as 10 years ago, the real Russian telescope had a worrying cost performance. It has been compared that the effect of Russian binoculars around 400 yuan is similar to that of domestic regular manufacturers (note that it refers to regular products, not some of the most common inferior counterfeit products on the market), and the price is around 200.
Therefore, because of the poor cost performance, the real Russian telescope has long been rarely sold, and most of this name is now used by some inferior small workshop products. This point has been explained in your introduction. Even if it is true, the cost performance of more than 500 Russian telescopes is not high or low. Just for the people you like, it's a little collectible. So ...