RW31 1964 Duck Stamp MNH XF 90 Catalog Number: RW31Condition: MNHCentering: XF 90> SKU: 14352 Free shipping $125.00 Qty: Add to cart Custom wishlist OK Add to wishlist Email a friend RW31 1964 Federal Duck Stamp. Mint Never Hinged. Graded XF 90 with PSE Certificate. Nene Goose by Stanley Sterns. Products specifications Attribute name Attribute value Catalog Number RW31 Condition Mint Never Hinged