Wilton Universal Turret Paternmaker Vise
What are they worth? I think because they are so rare very few people know about them, so they either sell for $20 or $150! It's crazy and there is no rhyme or reason to the pricing.
Check www.PatentPlaceUSA.com for a copy of the US Patent reproduced on Southworth parchment paper.
Click this link to see Wilton Universal Paternmaker's Vise for sale on eBay at this moment. (Don't hold your breath! They are rare as hens teeth.)
Click this link to see all the Wilton vises for sale on eBay at this moment. This will return a LOT of vices, because Wilton has been a prolific manufacturer of vises.