Does anyone have information on a Bush & Sons watch? The dial says Bush & Sons, 17 jewels, "anti-magnetic". The movement says Deauville Watch Co., seventeen 17 jewels, unadjusted, Swiss, on the back of the movement. The word 'DOW' is on the balance wheel cock (or bridge?). On the front plate it has "AS" inside a shield-like symbol with the number 1240 below it. The movement is about 3/4" diameter. The case, stainless, is pretty fat; about 1/4" thick. It's all in pieces, apparently to be cleaned. Everything appears to be here. What is the approx age, etc? Is it worth taking the time to clean and reassemble? (BTW- this would be a 1st for me. I have not tried a wrist watch).