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Auction: 177 - The Philatelic Collector's Series Sale
Lot: 247

Canada - Semi Official Airmails
1929-30, (10c) Commercial Airways Ltd, VIA AIR, four trial color proofs,
on thin white card, in violet, pale yellow green, mustard yellow, and deep orange, each with large even margins, a pleasing group, very fine. (Unitrade CL47Pii, CA$1,600)
Proof

Sold for
$325

Starting price
$240