The movement (mechanism) is an A Schild (maker) caliber (model #) 1187 or 1194. This movement was produced over about a 20 year period, and millions of them were made. You’ll find this movement behind dials with countless unidentifiable brand names. It was a real workhorse of a movement, very reliable, easily repairable, but undistinguished. The case is gold plated over brass, and most of the plating has worn off. It is hard to judge the condition of the dial because of the heavily worn, dull, and discoloured crystal. The case lugs are heavily worn, and you may have difficulty keeping a bracelet or strap on it. The Montrose name was used by a number of different companies. There is a list of those companies on Mikrolisk, here:
In short, anything you might do to try to improve the watch would cost more than the value of the watch save your money.
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