Improved Stamp Album

I have an improved stamp album in the Great Britain section there is a 1/2d stamp.


I have two choices 1937 or 1951

Could anyone enlighten me at all?

Many Thanks!

The first issue was dark green, the second light green. The colour changes reflected the difficulty of obtaining inks during WWII.

https://www.gbstampsonline.co.uk/ki...ves-59-c.asp

As far as I know there were 3 main lower value KCVI definitives, that, for the 1/2 penny:

1937, SG#462, green

1941, SG#485, pale green (war issue)

1951, SG#503, pale orange

The 1937 issue was printed in green. Due to Universal Postal Union regulations on stamps used for international mail, the colours of the lower values from the George VI definitives were changed. On 3 May 1951, the stamp was issued in the pale orange colour previously used for the 2d stamp.

What GeoffHa wrote is correct. In 1941 and 1942 the stamps with a face value up to 3d, those most used, were printed in a lighter colour. This was done to save ink and also reduce wear on the cylinders used to print the stamps. Both, as GeoffHa wrote, as part of the war effort. This gave rise to the pale green stamp.

So, as Cursus wrote:

10-5-1937: green (dark green)
1-9-1941: pale green (light green)
3-5-1951: pale orange.