Barbados -1970 Landmarks -50c Pumping Station Commercial Air Mail Cover to USA

Description

Barbados - 1970 Landmarks definitives: 50c Bowmanston Pumping Station (SG 411 or 411a, Scott 340) air mail  commercial cover from Allied Metals United, Bridgetown, Barbados to E.A. Adams & Son, Inc., New York, New York, USA. Air Mail
G.P.O. Barbados hand cancel, 11 AM, 6 AU 72 . Architecture - Historic Sites - Tourism.
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American Philatelic Society member #191231.