This sheet with 2 x values of £1 and 2 x 50p was printed by Enschedé in lithography / Intaglio on OFNP with PVAl gum. Just my opinion but this adds a little spice to any collection. It is also better than some of the special issue miniature sheets that the Royal Mail are churning out like wallpaper in a bid to part collectors from their hard earned .
The Pre decimals were first printed in 1955 (recess) by Waterlow & Sons and a reprint was issued in 1958 by De La Rue. The Pre Decimal stamps had values quite different to the miniature sheet stamps.
They also had a St Edwards crown watermark. A third printing in 1959 by De La rue had a multiple crown watermark and again a fourth & fifth printing in 1963 and 1968 (1963 also multiple crown ) by Bradbury & Wilkinson. And to make things more difficult a change of paper in 68 with no watermark.
The £1 stamps in red and blue respectivly were originally pre decimal 5/- and 10/-. The Brown 50p and black 50p were originally 2/6 and £1 values
Sorting the original pre decimal high value castle stamps can be quite a daunting task, but a tip is to sort the St Edwards crown first, these are one of two either Waterlow or De La Rue. Multiple crown are are either De La Rue or Bradbury. Those without a watermark are also Bradbury.
There are several characteristics to seperate these further, ie: paper , perforations and dated postmarks on used copies.
Posted by Roy