Keen Kutter Branded Disston Keyhole Saw

[Yadda]

I found a picture of this in an online 1939 E. C. Simmons Hardware catalog.  Branded with K’s on the outside edges of the handle.   

Patented by Disston in 1877.

[Bill Houghton]

I used to have two of the Disston models, until I gave one to an online friend.  It's an elegant little design.