Description:

CHAMBON "ESSAYS": 1937 1/- in black-brown BW #145PP(1)D, exceptional centring, unmounted, Cat $5000. Superb! Derived from the block of 4 discovered only in 2014 and subsequently split. To date, no other examples have been recorded. [When originally offered for sale in Europe, and subsequently (including in the ACSC), the shade has been erroneously noted as "black". Close examination shows that it is in a very dark shade of brown]