This watch could not be found in a free sale with a engraved symbol on the back cover as it is on this model that I present you, that symbol is the official emblem of the former Yugoslav military aviation. This watch was worn by the Yugoslav army pilots in early 80s of the last century, letters on back cover (RV i PVO) is abbreviation from the word : Air Force and Anti-aircraft defense.
This watch is 100% authentic, it is in original vintage box, have factory sticker on back case. Total MINT and fully functional which is very rare because it is known that this model had problems with the movement, a bit more precise with digital part (LCD) which is mostly defective. It works perfectly on this one.
This is a beautiful quality watch that is a great pleasure to have on your wrist.