cocollectibles 29 Nov 2013 09:20:35am | I sometimes have trouble distinguishing a CTO (cancel to order) strike versus a postal cancel. I have several Greenland stamps with cancels that I think are postal cancels, but I'm can't be certain given the positioning of the strikes on the corners; this is so similar to what many CTOs look like. Can anyone tell me if these are postal or CTO cancels? Thanks.
Peter
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