Weekly catch-up:
69: APO 69.

69: Quincy, Massachusetts, a Boston zone cancel. (A more complete example than shown before.)

70: Wollaston, Massachusetts, a Boston zone cancel.

71: Atlantic, Massachusetts, a Boston zone cancel.

72: Watertown, Massachusetts, a Boston zone cancel.

74: Arlington, Massachusetts, a Boston zone cancel.

75: Arlington Heights, Massachusetts, a Boston zone cancel. The flag machine was later moved to Earlville, Iowa and used without the removal of the "75"

75: Philadelphia, Pennsylvania, oval handstamp.

And to bump the thread by one increment:
76: Melrose, Massachusetts, a Boston zone cancel

76: a portion of a slogan cancel with part of the '76 falling on the stamp. Stretching the theme a bit?
