I was familiar with Hammond grinders since I have a universal vise from their cutter grinder:
http://vintagemachinery.org/photoindex/detail.aspx?id=13791
I learned something new today. They manufactured saws for sawing lead type for the printing industry. :
http://vintagemachinery.org/photoindex/detail.aspx?id=1262
Here's a link to a Hammond 400 BDD belt sander:
http://vintagemachinery.org/photoindex/detail.aspx?id=12944
Is that your machine in the first link? Either way, someone did a great job on the restoration.
I recently added a publication on VintageMachinery that I got from Hammond:
http://vintagemachinery.org/pubs/detail.aspx?id=6816
A Hammond rep told me that my tool was manufactured in 1981.
I will be making an entry very soon in the photo index as well.