Newfoundland C16a, 17a Postage Due and Officially Sealed a UNIQUE positional block from

a UNIQUE positional block from the only sheet ever found

quite well centered with full original gum

an unusual postmarked airmail stamp – the first we recall seeing with what we can describe as a mute double oval intaglio cancellation in black

imperforate pair on thick unwatermarked and ungummed wove paper

Newfoundland C16a, 17a Postage Due and Officially Sealed a UNIQUE positional block from1933 Sixty cent green & Seventy five cent bistre Labrador, matching mint imperforate pairs with sheet margin at left, large margins on other sides, full original gum, Very Fine, Lightly Hinged (Unitrade C16a, C17a; catalogue value $1,800)