Disston No. 3

[Northwoods]

Came home the other day with a Disston and Sons No. 3 pruning saw.  It has a nice No. 3-P blade with a good etch with the May 26, 1874 date (although I have no idea what it references).
The tote is about 4" by 7 1/2" and it has 16" of teeth.
It is the one that looks like a giant compass saw with a long goose neck.
I see it in a 1940 catalogue but want to know its production dates.  My only hint is that the Institute shows the "and Sons" was added in 1871, though I have no illusions that mine is anywhere near that old..  Mine has two crown nuts but never had any medallion.
Do any of you fellows have access to an early Disston catalogue or one from a mass distributor?

[mikeswrenches]

A picture would be nice. Patent below.

https://patentimages.storage.googleapis.com/pdfs/US151363.pdf

Mike

[Northwoods]

Evidently I was not clear.  I have seen this patent info, but mine is nothing like it.  Mine has the compass style pistol grip and is not split nut.
It is the third one down in this advert from 1940.

http://www.ebay.com/itm/1940-COMPASS-SAWS-SAWS-IN-NEST-BLUE-GRASS-MOHAWK-KEYSTONE-DISSTON-QUAKER-/221264333367?hash=item338461ca37:g:FEgAAMXQGQRSAA4g