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Depends on the weight of the watch and weahter it's solid gold or rolled/filled gold.
There are many places where one could find a Bulova gold watch. One could find a Bulova gold watch at popular on the web sources such as Belk and Etsy.
Gold filled cases are not worth much, they are plated and to difficult to separate gold from other metals. I have an 18kt solid gold accutron and the case and back stripped of all other parts is 19.2 grams
I have one. Lady size Bulova, Dior Collection, from 1970's. It is above US 1900.00.
This Bulova pocket watch is unique in that it comes with an attached pocket knife. The gold watch with cream colored dial is a unique combination too.
One of the best lady's watches bulova made, 23 jewels, l8 means it was made in 1958, usually the case is 10k rolled gold plate and has diamond accents, if the watch is working and the case in decent condition and has a band it's worth $100 to $150
My understanding is that a 15 jewel watch is not an "official" railroad watch. Elgin was probably playing off the railroad theme. You did not give the size or if the watch is open face or hunting case. I am guessing that the watch is open face. Value depends largely on whether the watch case is solid gold or if it is gold filled. I am guessing gold filled on a 15 jewel. If the case says "warranted" it is most likely gold filled. A 20 year case is 10k gold filled and a 25 year case is 14k gold filled. What I have seen sell in antique malls is $100-200 for gold filled and $300-500 if solid gold. I am not an authority on pocket watches.
a lot
$111.00
The thickness of gold on a gold-filled watch varies, including on the same watch, as a gold-filled finish can vary in thickness. But generally, a gold-filled finish will be about 20-40 microns thick. A 20 micron gold-plate finish is a bit thinner than most filled-gold finishes but is more uniform. A 20 micron gold-plate finish will wear a long time and compares well with a gold-filled finish.
i really don't know
The term "gold filled" is a misnomer. Gold filled pocket watches for instance, are really gold plated brass. If the watch is very old it stands to reason, most of the goldplating is wearing thin. As more time passes the metal that was plated with gold willstart to show through.Now we come to the guts. The guts in a watch is as variable as the guts in a car for instance. Which has better mechanism, a Cadillac or a broken down pickup truck.Combine the quality of the mechanism of a watch (like Swiss movement) add the value of the case (14kt solid gold) and you have the total value of the watch.Gold test kits can be purchased on line. So you can check the gold content yourself.As far as the mechanism goes, have a pro guide you.Danny in Mesa