Addendum: These are in fact the quite scarce 1966-67 Topps USA Test hockey cards and are in fact marked "PPTD. IN U.S.A."
1966 Topps USA Test Hockey Collection (19). Includes #s: 2 Worsley (VG), 3, 5, 6, 8 Richard (EX), 9 (2), 11, 14, 16, 17 (2), 22, 24, 27, 28, 29, 37, 57. Grades overall EX to EX/MT (few lesser).