Thank you. I bought the camera from a very trusted source so I was more worried about the lens (or that I could've done something to the camera since it's been in my hands). I noticed that the focusing screen has some marks but I couldn't correlate them with the marks on the scans.
Sadly, I don't remember where I developed these (because it was 1.5y ago and I also developed bunch of film I shot with Holga since, in couple of different labs).
I would like to develop my own film (had done it in high school but that was some years ago) but I have a way to go before I embark on that adventure.
You've all been very helpful and I am grateful for that.