Center dispenser mis-marked as 20 Ct Gillette "Blue Blade" dispenser w/"Speed-pak" notation and Z-1 blades. NOTE: Case is only 10 Ct size. The first "Speed-pak" introduced in 1947 w/only 10 count & cream color. 20 Ct dispenser later introduced in 1949 (case all blue) but no "Speed-pak" designation.
