Stephens & Co.
The earliest reference we can find is in 1869 for the A. P. & M Stephens & Co. We are assuming that the "A P" represents Anson P Stephens, but we have found no reference for M Stephens to date. A. P. Stephens first patent for improvement of vises is 1864, therefore we can assume company founding sometime between 1864 and 1869.
We do find a library citation in the BCIN directory for an 1870 A. P. & M. Stephens & Co. catalog.
There are many sources that cite Asa S Cook as beginning to manufacture Stephen's vises in 1872. These references include:
- Illustrated Popular Biography of Connecticut - 1891
- Asa S. Cook's obituary - Hartford Courant 1/14/1916