Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Swaziland - Zeppelin Flight - 1935 (August 28-31), 11th SAF registered cover from Mbabane, franked by complete set of King George V Silver Jubilee issue, Berlin ''28.8.35'' connection, red letter ''a'' Flight marking, Bahia ''31.8.35''machine arrival ds on reverse, VF and very rare, Sieger #317, Swaziland origin is not mentioned in the catalogs, Est. $1,500-$1,800, Scott #20-23