Here is an exceptionally clean Disston Keystone K-4 Airmaster crosscut saw. Made in the 1930s, these saws had a lower price to make them more attractive to homeowners, yet these saws are excellent performers.
The plate on this example is very clean with a bold etch. The beech handle has a few abrasions, but no cracks or chips.
The 8ppi crosscut teeth have been freshly sharpened:
Tooth Type: crosscut
Rake Angle: 15º
Fleam Angle: 20º
Slope Angle: 0º
Tooth Set: 0.006"