908 = 9mm Value Line Single Stack gun with 8 round magazine.
909 = 9mm Value Line Single Stack gun with 9 round magazine.
915 = 9mm Value Line Double Stack gun with 15 round magazine.
910 = 9mm Value Line Double Stack gun with stupid Clinton 10 round magazine, but oddly enough a 15 round magazine fits just fine thank you.
And so on. 457...
And don't forget models like the 908 were available in both aluminium and stainless frames (908S)
And Chief's Specials like CS40 were also made in various finishes; black, natural, and two-tone