First Day of Issue = April 4, 1992
Size: 17.50 mm x 25.00 mm
Quantity printed = 500,000
Perforated 10.00 x 11.50
Print method: Lithography

This is Scott Russia 4599 overprinted with LATVIJA and surcharged 25 rubles.

Catalog numbers
Scott 331
Michel LV 339