Congratulations on winning the auction! Manufacture date is January 1942, so you were close. It is an Early Wartime Police HSc, Variation 1. A Variation 2 is an Eagle F not L and would have been dated in 1945. The long block Firing Pins were standard after 708708. From everything I saw of the auction, you obtained a legitimate Police pistol.
Remove the left Grip. If the bottom of the Disconnector groove is square, its probably OK. After- market wood Grips usually have a round bottom in the groove. Anything else, let me know.