The model #1 was very early 1960's. Again, because of the sheath. It's a Johnson, with a horizontal stamp. These were turned vertical very quickly after production began.
Thanks, Tune!
Note: You may want to reconsider the "Johnson" sheath discription on that Model 1. These are photos from a fairly recent e-bay auction of the estate of an old Heiser employee:
Here is the auction text so it's saved for posterity:
4 Randall Knife Sheaths. 1-7,1-8,12-9,15-5 1/2. All Rough Back. New Condition.All are missing a Snap. AND the 15 5 1/2 sheath has torn stitching on the Sharpener Pouch. See Photos. The Story: Came from a Estate of a Leather Worker whom worked at "Heiser Saddle Co."in Denver. It was a great Sale ,Besides Leather,Tools,Heiser Stamps..... There was quite a few Saleman Samples. Included were these Randall Sheaths. You will Notice all are marked with "SAMPLE" in red ink. I was unable to remove ink .Maybe you will be more Successfull or Maybe Black Dye? Which Ever, I hope someone has a use for these Sheaths.
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Ron Mathews RKS No. 4223