I just posted this on the main vise thread. It might be helpful to have the information on The Vise Information thread too.
Parker 954/104 Eclipse Machinists' vises
(Including a swivel conversion kit)
SoCal: Your vise is fairly rare. Here is a 1936 catalog page showing Simplex vises even though it had become Desmond Stephan by 1932.
They were solidly built vises
I have found no information about that except that Bonney's Rapid Transit ads don't clearly show Parker style jaws until 1891 - well after Parker started. Also that seems to be the only Bonney vise that did. Does anyone else know anything about that?
Outlaw: I was a bit puzzled that you didn't think of Bonney Vise and Tool as vise makers. I was so focused on the vise part of their operation that I completely forgot that in 1921 there was a name change and a manufacturing change. Thanks for the second hand reminder.
mk1finks: Here are two Mortimer Lewis patents. The 1901 patent is the date on Emmert Presto vises. The 1904 Lewis patent was specifically assigned to Emmert Manufacturing. The drawings may be helpful when you restore yours. Nice find!
I didn't find any information on No.101 vises but in 1909 Rock Island offered a No.1 that had the same size jaws. Notice that they also offered versions with swivel jaws (but not in the No.1, No.2, or No.3 sizes). By 1920 Rock Island only offered non-swivel versions.
Member dannyr posted a 45 mm Model 835 Henri Picard & Frere vice on the main vise thread - post number 95974.
This page is from their 1910 dental supply catalogue
Machoires = jaws. 45mm = 1.77 inches 60mm = 2.36 inches incassables = unbreakable
Henri Picard and Brother did have...