Sure. In the 1980's, Schrade was on a roll and were doing their best to expand their market reach. A pleth...apleath... a lot of new designs were tried by the Bayer brothers under both the Schrade and newly acquired Imperial names. Fishing knives was one of their experiments in the sportsmans market.
The first fillet knife appearing in the mainline Schrade catalogs was the Staglon handled 167UH Steelhead in 1982, 12" overall with a 6 3/4" Schrade+ stainless blade, and listing for $24.95. Introduced the same year, though shortened versions of what we now recognize as classic fillet knife style, were the 7 1/4" (2 5/16" blade) 162UH Wolverine, and the 7 ½" (3 3/16" blade) 164UH Badger. While the 162UH (1982-85) and 164UH (1982-88) were short-lived, the 167UH became the mainstay of Schrade fillet knives through 2004, finally listing for $42.95 in it’s last appearance.
In 1983, the Steelhead 167UH was augmented by a smaller classic fillet shape, the 10 ½" (5 1/4" blade) 168UH Walleye (1983-1989).
Also listed in 1983 was a new idea altogether, the “checkered” textured graphite handle 11 1/2 GF65 Grafillet Bigmouth and 9 ½ GF45 Grafillet Littlemouth, with 6 ½ and 4 ½ blades respectively. These both were discontinued from the catalogs after 1985 and from production after 1986, being only produced for four years, making them relatively uncommon today.
The MA-5 and MA-6
Mighty Angler folding fillet knives were introduced in 1985 and produced until their last appearance in 1989 for $38.95 and $43.95 respectivly. That was a bit steep for that time and they were discontinued.
http://www.collectors-of-schrades-r.us/FLYERS/1980s/pages/SC85-11J.htm
Codger
PS- I could tell you the precise quantity shipped, but it takes quite a bit of digging thru production records for those years and a few years before and after. They sold them before listing in flyers and catalogs, and emptied the shelves after they discontinued listing them.