Shown below is some research that I have come across for my new book on World War II Thompsons. It is a listing of contracts for manufacturing of box magazines for Thompson Submachine Guns. Notice, the fourth line down, the name Sparks-Withington Co. (S-W CO or SWCO). Also notice the last line and name mentioned Crosby Co. (Cco) 30 round box magazines. I think this answers who produced these magazines once and for all. |
