Lot 1719
 BK
Canada Semi-Official Airmail, 1924 (25¢) Laurentide Air Service, 4th issue (Unitrade CL3a), booklet with three panes, fourth pane included loose, booklet has been opened and re-stapled. O.g., never hinged. Loose pane has stain at edge of margin. Very Fine. Unitrade C$1,800 as NH panes ($1,350).
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| Realized $900 |
