Not all clocks have serial numbers marked on them. As a matter of fact, most clocks don't. However, there are a handfull of well known clock manufacturers that used serial numbers to designate the sequence of their clock production. If a clock has a serial number it is usually stamped on the back plate of the movement. Listed below are manufacturers that used serial numbers. If you can find a serial number on your clock, you may be able to find the year in which it was made by.
These items are not for sale and the descriptions, images and prices are for reference purposes only. You can reduce the number of items displayed by entering a keyword that must be included in the description of the item. Good vintage slate architectural mantle clock movement marked for Japy Freres, France, key and pendulum available, height 34 cm Show 4 more like this. Japy Freres marble 3 piece clock garniture circa , with 8 day striking movement bell, in two colour marble, An Art Deco marble and spelter figural clock, circa s, with maker's stamp for Japy Freres, the flat topped arching clock in contrasting red, green and coffee coloured, marble, the enamel dial with Arabic numerals and surmounted by a seated nude, woman.
They produced many watches and clocks, estimated in the millions during a good years. In very short time the production was more then double the usual way. Japy Freres also created the machines or modified machines to do this.