Vostok Precision wrist watch, calibre 2809A, first half of 1960.
It has black dial. The dial has marked with arabic numerals at 12 and 6 o'oclock, and the rest of hours are marked with hour markers (doubled at 9 and 3 o'clock). Arabic numerals and hour markers are luminious . It has a longer red second hand which is a center sweeping. This calibre has been produced between late 1950s to late 1960s and inspired by Zenith chronometre calibre 135. This movement was manufactured in Chistopolsky Watch Factory. These movements were improved by making its jewel count up to 22 (4 additional cap jewels in bearings of anchor and 4th wheels) and breguet hairspring and bigger screwed balance wheel to improve accuracy. And the factory tested movements for accuracy, a similar test to COSC. Movements passed the tests installed in Vostok and partly Volna brand cases and dialed with these brand names. The Chistopolsky Watch Factory (ччз) changed its name to Vostok (BOCTOK) in the early 1960s and employed "B" for Vostok on the movements it produced from that date onwards. Thus this watch has "B" symbol stamped on its back plate shows that the watch was manufactured right after the company had employed its new name : Vostok and the serial numbers inscribed on the back plate indicates the factory after it's been re-named began to used new serials on the movements it produced.
It has black dial. The dial has marked with arabic numerals at 12 and 6 o'oclock, and the rest of hours are marked with hour markers (doubled at 9 and 3 o'clock). Arabic numerals and hour markers are luminious . It has a longer red second hand which is a center sweeping. This calibre has been produced between late 1950s to late 1960s and inspired by Zenith chronometre calibre 135. This movement was manufactured in Chistopolsky Watch Factory. These movements were improved by making its jewel count up to 22 (4 additional cap jewels in bearings of anchor and 4th wheels) and breguet hairspring and bigger screwed balance wheel to improve accuracy. And the factory tested movements for accuracy, a similar test to COSC. Movements passed the tests installed in Vostok and partly Volna brand cases and dialed with these brand names. The Chistopolsky Watch Factory (ччз) changed its name to Vostok (BOCTOK) in the early 1960s and employed "B" for Vostok on the movements it produced from that date onwards. Thus this watch has "B" symbol stamped on its back plate shows that the watch was manufactured right after the company had employed its new name : Vostok and the serial numbers inscribed on the back plate indicates the factory after it's been re-named began to used new serials on the movements it produced.
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