Niue
1978 Coronation 25^th Anniversary, IMPERFORATE $3.30 Miniature Sheet

Topic: Royalty

On white gummed paper, Mint Never Hinged

Stanley Gibbons Catalogue: #MS248

Plate Proofs or Imperforate are not listed

I believe this to be a Plate Proof. The printer of this stamp issue Fournier S.A sold its philatelic archives of stamp artwork and proofs in 2007 through the German stamp dealer and auction house Gärtner.