Picked these up at a yard sale today but couldn't find any info on the Imhoff & Lange,
and the other has letters worn off.

The worn letters are P.S.& W., Peck, Stowe, and Wilcox, later known as PEXTO.  The numbers below them almost look like a government inventory number?   I have never seen a poor PEXTO tool, they all seem to have been top notch.   Not sure where the other name came in. 

Heelspur, I like the P. S. &W Pliers, those wide handles on small pliers are nice to use.
Concerning the second pliers, I have not seen that name before ( I have over 70 box jointed pliers) my first guess would be German, though there were a few English and American companys with "foreign" names. Those box jointed pliers are forged (No machining) after they are put together, you can see the "married" sufaces where they close up. Also note that they have an all over filed finish, I would date them somewhere between the middle to late 1800s.
Graeme

Really great info, thanks.
Was wondering about the file marks on the Imhoff & Lange,
had no idea they could be that old, not a bad buy for a quarter.