The seller still hasn't replied with the Sears number. This is the ENDED auction 220122674517. Regardless of the exact I.D. of the manufacturer and pattern, would you say the final auction price was at, below, or above the knife's value? As you will see, it is 3 1/4" closed and has stainless blading.
Absent confirmation of the number by the seller, or input from Mr. Williams or Mr. Gibbs, I am inclined to think it is a Camillus product. This based upon the appearance of the blade shape, nick, kick, pins locations. I've not yet found an illustration of a Camillus stockman with the same serrated sheepsfoot blade, but I've found it in the illustration of the 712S Congress pattern in the Camillus Catalog #3 circa 1992.
Michael