Mystery Vise (unknown manufacturer). 3-3/4” jaws that opens to 8-1/4"” and weights 73 lbs. Swivel base, with center below the bench swivel release. Plain iron jaws, no replaceable steel jaws, no cast-in-place steel jaws.
I have this posted over on the big vise thread where I had asked for help identifying it prior to purchasing. I ended up buying it, but the manufacturer and model number is still a complete mystery since there are no markings on the vise body. I'll post a few additional pics here, now that I've cleaned it up a bit, hoping that there might be some key identifying features that someone recognizes.
As-found condition: (very rusty, badly pitted on the right side, must have been left lying in the mud for many years to get this bad. Sold at auction from a homestead property in very rural countryside near Ottawa Ontario Canada.
Condition after cleaning and electrolysis: The jaw towers have a bit of a bevel cut to them. Screw retained by a front collar plate. Both of these features remind me of Parker, but it isn't a Parker since all of their vises were very well marked.
Markings: The only markings whatsoever are found on the main nut (made of bronze, same as the collar) and on the base plate for the swivel mount. Dual-marked as 4 and 4-1/2, so I'm assuming that these items were shared by the Model 4 vise and the Model 4-1/2 vise made by this manufacturer (whoever it was). The base plate is of the less common type for below the bench swivel vises, in that its hold down bolts are exposed on the periphery rather than being hidden under the vise body which was a much more common style.
Plain iron jaws: This is the first vise I've ever owned that doesn't have additional hardened steel replaceable jaws or hardened steel cast-in-place jaw inserts. Not sure if that is the sign of an older vise, or just a cheaply made vise. It definitely rules out Parker as a manufacturer since even in their oldest catalogs, their vises all had steel jaws. On the other hand, the plain iron jaws seem to have held up reasonably well in service. I think this vise might be what manufacturers used to advertise as "semi-steel". This vise is extremely heavy for its size (73 lbs for only a 3-3/4" jaw), and I think steel is denser than cast iron. The casting quality of this vise is also extremely poor, with some bad voids and lumpy surfaces on all pieces, which apparently is another characteristic of semi-steel compared to cast iron. in that it poured poorly and often didn't fill the mould perfectly.
Square, plain styling: I've ruled out many possible manufacturers because the styling of the stationary on this vise is very squared off with nary a flying buttress (Parker) or front edge rounded protrusion (Reed) to be seen.
Odd main nut design: Rather than the typical dovetail shape for holding the main nut in place, this bronze main nut is square bottomed, except for two short square wings at the rear only that fit into matching square undercuts. This was a bad design, since the two wings broke off of the main nut, and now the nut is very loose. (I'll have to figure out a way to fix it if I want to make this vise a user). Another odd feature is an internal tower that sits in front of the nut to take the force when clamping tightly.
Thanks for looking. Hoping that someone might recognize a manufacturer for this vise, although I'm guessing it might just have been an unmarked vise made by a local foundry back-in-the-day.
Thanks, Tom