First Day of Issue = March 15, 1933
Size: 26.00 mm x 33.00 mm
Quantity printed = 10,420
Perforated 10.00 x 11.50
Print method: Lithography

Stamp shows a proposed tomb for Latvian aviators. The surtax was for wounded Latvian aviators.

Watermark



Catalog numbers
Scott CB17
Michel LV 218A

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