This 14 inch swing brace is similar to PEXTO-07, except that it has greater swing and a later ratchet mechanism.  It does have the Altwein patent jaws and Smith patent ball bearing chuck.  If one assumes that the jaws are not a later addition to this brace, the presence of the July 9, 1895 patent date on the chuck and the Altwein jaws (patented January 24, 1911) mean that the brace had to have been made in the short period before the expiration of the chuck patent (July 10, 1912) and within the period after Altwein applied for his patent (May 24, 1910).  I do not know how the later ratchet mechanism squares with this sequence.

Alas, one of the Altwein jaws has been broken; and the wrist handle is cracked: