First Day of Issue = March 15, 1933
Size: 26.00 mm x 33.00 mm
Quantity printed = 8,920
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 CB17a
Michel LV 218B

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