The Rare Book Detective: books, type, watermarks: 1576 Anchor with 6 pointed star above
The Rare Book Detective: books, type, watermarks: 1690 Anchor - in double line in circle with star above
The Rare Book Detective: books, type, watermarks: 1553 anchor with star above watermark
The Rare Book Detective: books, type, watermarks: Anchor in circle with star above