I have been offered this watch but I can find no information what so ever on it. Any guesses as to age or collectiblity or even what I should pay would be greatly appreciated. It does have a plastic "crystal" but looks to be original as does everything else except the band. The picture makes it look as if there are pieces missing on the dial but it is complete though somewhat dirty. I have offered 100usd but have no idea as to its worth.