A Bass, but no Maker

[Paulien van Mourik]

Hi guys,

- I actually started this thread on TB, but was redirected here, 'cause of your expertise -
I play a borrowed bass from my orchestra. It's Russian, and I haven't got a clue where they got it from (the other two basses they own are Dutch). I was kinda hoping any of you have knowledge of Russian basses, because there doesn't seem to be much information on the internet.
The bass has got a tag inside, saying "Model Antonius Stradivarius Anno 1700, Made In USSR, Moskow 1969, N. 355". There is only a blue sigil with a kind of harp as a sign of a factory or a brand on the label (See photo). I've added some photos, and hope you can answer some questions about it, like:
- Is it handmade or is it from a factory?
- Why are it's shoulders uneven?
- What quality is it? (or can't you tell that from pictures )
- Why has it's back got that arch/slope, is it common?
If you recognize the sigil or the model, if you know an answer to one of my questions, or just know more about (this kind of) double basses, please share.
By the way, it might have a little difference in colour due to bad lightning and flashing. Oh and it looks a little dusty. Thats the flash too. I dust it regularly ofc. Also, it looks like it's been used as some kind of battering ram or something. I didn't do it!
If you need more photo's, I can upload more.
Thanks!