The Rare Book Detective: books, type, watermarks: Fool with horizontal braid and 4 bell collar
The Rare Book Detective: books, type, watermarks: Joker - 4 extant collar, 2 bell hat even, with braid and 4 and trefoil under
The Rare Book Detective: books, type, watermarks: Joker - with 4 extant collar and braid
The Rare Book Detective: books, type, watermarks: Joker with 7 extant collar with 4 and trefoil under
The Rare Book Detective: books, type, watermarks: Joker with 7 extant collar, no braid and uneven 2 bell hat
The Rare Book Detective: books, type, watermarks: Joker/fool with uneven 2 bell hat