Scarce regionals------to look out for : (Guernsey) 4d plain

Guernsey is one of the main islands of the Channel Islands situated in the English channel but nearer to France than England, these islands were occupied during the second world war and stamps were issued during the German occupation, after the war, the islands resumed using British stamps again.
The first regional was issued on the 18th of August 1958 denoting a value of 3d, followed later by the 2½d value on the 8th June 1964.
The first 4d stamp depicted above, began life on the 7th of February 1966 and three different printings are known of this particular ultramarine (blue) coloured stamp all printed from cylinder 1 no dot they are as follows :-

The 4d ultramarine (plain) issued 7th February 1966 with a multiple crown watermarked paper.

The 4d ultramarine issued 24th October 1967 tagged with a 9½mm broad violet phosphor band split between stamps on the sheet, with Wmk multiple crown.

The final 4d ultramarine appeared for sale on the 16th of April 1968 printed on a chalky paper without watermark and the same 9½mm violet phosphor type bands.

Since 1962 all stamps are officially printed on a whiter paper replacing the previous cream paper that had been used for earlier printings or previous stamps.

In my study of papers used for the Guernsey 4d plain I discovered stamps that appear to have been printed on a cream paper contrary to the post office statement made in 1962.
This first attachment is of the two different papers as seen in the normal spectrum, both with left sided margins >



The same stamps but under longwave UV light.



It is quite obvious when you compare the two pairs of stamps as being on completely different types of paper with the ones on the left representing a cream paper whereby the ones on the right represent a whiter paper.
The total quantities sold in combination is stated to be 4,415,040 but how many cream and how many whiter ones was actually sold and distributed ? : The cream paper variety has never been listed !!!!!