Keen Kutter 8 ppi K4?

[Jack in omaha]

I love the Keen Kutter line. We see it here in Nebraska.
I have a Keen Kutter 8 point Air Master K4.
This says Keystone I am sure it was made by Disston.
What is the equivalent Disston saw?
The motto The recolation of quality will be remembered long after the price is forgotten.
but herte my query is about the quality I found the price $1.75.
My saw has the early logo the aircraft indicates a date of close to the 1940.

[C. in Indy]

Sounds like a pretty one!

Here is a link which may help:
http://www.disstonianinstitute.com/key1935.html