1. colour shifts (which are plentiful on this stamp) are NOT related in any way to re-entries.
2. when looking at the Unitrade catalogue, do not forget to read *all* of the notes for the particular stamp. In this case, the first note under the listing describes the re-entries.
3. anything to do with Canadian re-entries ... you must check out Ralph Trimble's site:
http://www.re-entries.com/4. to plate your Map stamp, you need "The Canadian Map Stamp of 1898 - A Plating Study" book by Whitney L. Bradley (published by BNAPS, 1999, 188 pages).
