The 15OT was a very successful pattern. I see them in the catalogs from 1964 through 1997.
I have not seen a 15UH in any of the catalogs. Robert Clemente does not list a 15UH in his book.
Does this mean that a 15OT was never made with Staglon handles..........absolutely not, (even f I have not seen one).
As most Schrade collectors say, "Anything is possible with Schrade."
Schrade was famous for SFOs and small runs that never made the catalog. The 77 Muskrat pattern is never listed in the catalogs being a Uncle Henry, only as an Old Timer, but they did make a special issue of 77UH for Ducks Unlimited. I had never seen a 77UH without the DU etch until one day on ebay.....so I bought it. Later I found out that Larry Vickery (lrv) has one listed on his web site. They are not as rare as I thought.
I have not seen nor heard of a 15UH.........but keep watching eBay. You never know what will show up.
But the 15UH was not in the production line of the Uncle Henry knives.
Now you have me wondering........................Why was such a popular pattern never made as an Uncle Henry?

Dale