First Day of Issue = December 7, 1932
Size: 29.00 mm x 35.00 mm
Quantity printed = 12,220
Perforated 10.00 x 11.50
Print method: Engraved

Issued to shows stages of aviation development. This shows the first hydrogen balloon flown by Jacques Charles in France. The surtax was for wounded Latvian aviators.

Watermark



Catalog numbers
Scott CB11a
Michel 212B

For more information check out the links below
Jacques Charles
Latvian airmail semipostal stamps
Latvian aviation