CREATE TABLE table_11900773_4 (paper_type VARCHAR, theme VARCHAR)

What kind of paper were the stamps with the theme duck decoys, barrow's golden eye printed on?
SELECT paper_type FROM table_11900773_4 WHERE theme = "Duck Decoys, Barrow's Golden Eye"
SELECT "paper_type" FROM "table_11900773_4" WHERE "Duck Decoys, Barrow's Golden Eye" = "theme"