First Day of Issue = April 4, 1992
Size: 17.50 mm x 25.00 mm
Quantity printed = 2,500,000
Perforated 10.00 x 11.50
Print method: Photogravure

This is Scott Russia 5985a overprinted with LATVIJA and surcharged 1 ruble.

Catalog numbers
Scott 327
Michel LV 335II