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:

Anson Stephens Patents from DATAMP

View Reference: