S21149

South America Flight 1931 as perfect clean registered letter (was 1st time allowed by sending with airship) from the 3rd flight sent from the Netherlands with very good single postage to Friedrichshafen and then by airship via Brasil to Buenos Aires (arrival postmarks), from there to the receiver in Bad Homburg (arrival postmark backside), very good quality, Sieger 133 o NL, Michel Zeppelin specialized catalogue 229 a NL