May 1953. No imprint. New Electros.
Originally issued with imprint in the lower left corner of each sheet.
From Nov 1952, imprints were dispensed with for all stamps. This issue appeared with no imprint from May 1953.
White paper: see below.
30th Jan 1957 Unwatermarked .
After 1956, all values up to and including 2/6d were printed on unwatermarked paper. Naturally, this issue appears with no imprint, which had been dispensed with.
Total Quantity excluding white papers: 85,813,200.
In September 1965, stocks of the 2/6d Robin had run out. The Chambon press was preparing for the decimal issues. To overcome the shortage, electros containing imprint AND no imprint were utilised. A total of 85,064* stamps were issued on unwatermarked white paper.
*The odd quantity reflects the destruction of residual stock at decimalisation.