I would be surprised if they don't have an actual address and an office, after all, they do produce and sell something, even if it's lingerie and I tend to believe that part of their business is legit.

As for visiting them, it's a waste of time, if at least there were highways in the region I could have asked a guy I know that lives in Varna with who I did exchange some coins while on holiday at the black sea and kept in touch over the years, but I'm not even going to propose him to drive 8-9 hours for ..what? It's most likely that the "office" is going to be closed or somehow just that exact day the model miner is displayed somewhere else