Sheaths and fixed blade knives have always gone together, a stock designed sheath accompanying almost all such knives from the factory. Replacement sheaths, hardly ever illustrated or priced in the catalogs, were generally available from the factory for a nominal fee, sometimes just for the asking. Pocket knives, as the name implies, fit in, and were usually carried in the pocket, negating the need for a sheath. With the advent of hybrid knives, the large folding hunters, a belt sheath was needed because the weight and bulk generally precluded comfortable pocket carry. One of the earliest examples I can find illustrated is the 225 Hunters and Trappers knife, seen for years (since the early fifties) with no mention of a sheath, then shown in a 3225 gift set with a folded sheath and stone in 1964.
In 1965, the 25OT is shown in a gift box with a folded waffle tooled, laced sheath with stone, and the 3225" set is called a Safari set with its scenic tooled sheath and stone.
In 1967, the 225 is offered in a G3225" Gaucho set, the sheath having five rivets, or in the 3225" plain set.
In 1968, the 25OT is noted to include a sheath (not shown), and the 127UH is introduced, illustrated with the scenic tooled folded sheath. The 3225 is still offered with the scenic tooled folded sheath.
In 1969 and 70, the 127UH is shown with an included deep drawn stitched sheath, while the 25OT is still listed as sheath included.
In 1971, the 25OT is shown with a deep drawn, round bottom stitched sheath. 127UH simply lists with sheath, but this year, a sheath is shown available separately Leather sheath for 225"
For 1972, 73, the 125OT, 25OT, 227UH, 127UH, and 225 are all listed with sheath, and the Leather sheath for 225" sheath is still listed as a separate item.
In 1974, 75, all (125OT, 225OT, 127UH, 227UH, 225) are listed with sheath, none illustrated or offered separately.
For 1976, 1977, The scrim 260SC is added, and with the 25OT, 125OT, 127UH, 227UH, and 225, is listed with sheath. But... the #226 sheath for the 225 is listed as a separate available item.
In 1978, the #280 was added to the #226 sheath as an option. Those two remained listed through 1982.
A last question? Your questions are always welcome here! We just don't always have the answers!
Michael