What Does SK mean in Wilson Glove

[Hodges14]

I have a Wilson Lou Boudreau S.K. 10 model glove. In a earlier issue of Glove Collector it had a picture of a Wilson glove and mentioned that all of his were SK models. I couldn't fine any list of a model SK in the yearly prices of Wilson gloves. My model is a laced four finger and measures about 9 inches from top to bottom and 8 1/2 inches across and has kind of a square look to it. It is in almost perfect condition. So I was wondering if there is any significance to the SK compared to their other numbering of gloves. Thanks. WB