Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Canada - Newfoundland - 1931, Airplane and Dog Sled, imperforate plate proof of 15c brown, printed on thickened yellowish watermarked wove (horizontal mesh) paper, no gum as produced, NH, VF and rare, NSSC #AM10o, priced with''-'', Est. $600-$700 , Scott #C9