Keystone-Howard 16-Size, 17-Jewel, 3/4-Plate Movement Examples

Keystone-Howard 16-Size 17-Jewel 3/4-Plate Watch Movements
(and a few other interesting 16-size movements)
Keystone-Howard factory records that relate serial numbers to movement grade (series) have not come to light, if they existed at all. Below is a table of observed surviving examples.

Keystone-Howard 16-size, 17-jewel, 3/4-plate movements, along with the rest of their movements, were referred to in catalogs by their descriptions. The catalog numbers of specific watches (the company only sold complete watches) were made up of a 2-digit number representing the case and a 1-digit or 2 digit prefix related to the description of a specific movement (see the Wiki article on the E. Howard Watch Co.) to be provided in the case. The catalog prefix numbers came to be referred to as the series numbers. Although the 16-size, bridge model movements were eventually produced bearing their series numbers, this was never done to the 3/4-plate model movements. However, some 3/4-plate movements are marked "No. 2" or "No. 4".

The movements initially listed in this table were drawn from the data base created and maintained by Ed Ueberall and Kent Singer. Other members may have added additional examples, and are encouraged to continue to do so (hopefully in serial number order), or at least report additional movements in the under the Discussion Tab at the top.

The data in this table was collected from internet listings, dealer mail-order lists, reports and personal observations, mostly at NAWCC marts. As such, it is subject to errors in listing, reporting or recording. Those spotting an error when compared to a movement, or picture of a movement, are encouraged to correct it, or at least report it under the Discussion Tab at the top.

Where a series number is shown for a movement, it is inferred from the damaskeening pattern and, in the case of Series 9, having a serial number above 1,123,000. There are not believed to be any series number markings on 3/4-plate movements, but should such a movement be reported, the marking should be listed, within quotation marks, in the Comment column of the table. Other notes and list of abbreviations appears below the table.

(and a few other interesting 16-size movements)