There is an ongoing discussion on watch.ru about Amphibia Radio Room. http://forum.watch.ru/showthread.php?t=130572 . Some participants wondered when it was actually produced, and I posted some links to WUS discussions, noticing that all NOS octagonal Radio Rooms presented there, were supposed to be produced in February 1990. And then our own Amil detected something very worrying – the bezels are different and the serial numbers are too disparate.
Normally, there are several bezels which could be considered legitimate for one Amphibia model, because Vostok usually used what was available at the time. But it is odd that in one moment – February 1990 – and for a limited series of watches, different bezels were selected.
More important, when somebody buys a NOS Amphibia, they normally look for matching numbers on caseback and papers. The papers presented on this forum have matching casebacks numbers, so each individual watch seems O’K. What is troublesome, is that the serial numbers vary hugely – 000288, 006235, 017740, 283701, 358632, 888953. Now this is impossible. 000288 – 888953 should mean that almost 900 000 watches were produced in February 1990, all of them RR.
One could suppose that some overstock series of casebacks were used alongside with new ones – I believe such things happened regularly in Chistopol - but in this case we don’t have two or even three series of casebacks. The closest ones differ by 60000 – more than the whole Amphibia RR run. There is something really unusaul here, I think.
Original threads, where these pictures were displayed
Sorry to borrow photos without permission, but I wanted to mark the serial numbers and the month / year of production.