Watch (Sorry Not Coin) Metal Identification

Of all the gold watches I have ever seen, the back cover will be gold also.

This watch has a thin gold plated brass case. The case was not made in Japan, but the movement was.

I suspect that the case was made in Korea or China

The movement is probably a cheaper Seiko one, made in large numbers for the case manufacturer, who probably had a few different case styles at that time, designed the take a standard movement.

Horology (the science of time keeping), can be a fascinating subject.

I have a granfather clock, or should I say, an English farmhouse clock, the movement made in London and sold by a one Edward Martin in Dover, in 1795. The clock as a whole is a composite one, because the case is of early Victorian vintage, in English oak, black laquered.

Forgeries abound in classic watches of all eras.

I am not saying your watch is a forgery; I certainly don't think it is, nor was there any intention of it being so. It is just a commercial production deliberately made that way.

I have been in the Grand Bazaar in Instanbul, and have seen many fakes and forgerys of classic 17th and 18th century watches and marine chronometers of the 19th century.

They see a western tourist and say "I have one of the rarest and most desirable classic watches you are ever liable to see anywhere!". I say under my breath 'LOOKOUT!'

That is your key indicator right there- those bumps are analogous to zinc zits on a Zincoln, plating corrosion.