And the reverse.
There is a note at the bottom of Norweb 2 lot 520 stating the other known example of this type has the provenance ex Caldecott, ex Dean Rogers, Brand-Lichtenfels Sale (Kreisberg/Schulman, New York 18/3/64 lot 2737) and SNC March 1965 (CC1324). However, the appearance of a rather worn example in Baldwin’s Basement sale suggests that piece was the ex Roger’s example as it was accompanied by a note stating a gift from C W Peck 1951 who noted there were only 2 examples known. As Peck’s piece passed to Norweb when his collection was sold, this would therefore appear to be a third and previously unrecorded third example, but a bit of digging has shown this to be the Caldecott piece, bought by Brand, and sold in the US in 1964 before reappearing in the Circular in 1965. Norweb's went to Nicholson. It was the Rogers piece surfacing that finally resulted in 1 and 1 making 3, because it had been in Baldwin's basement since Rogers' death in 1961 and so could not be either this piece, or Norweb's