planchet size variations in Edward VII?

[scott]

now i know, or at least heard about such things existing in the H and KN's with george V, but i have here, 2 similar grade pennies 1 of 1907 1 of 1909 (in aVF) put them one on top of the other i can feel a slight differance in the 2 when the 2 edges touch my fingers, and also visually, although the gap is well under 1mm hard to say, but the 1907 is slightly bigger then the 1909 (checked with a more worn example and same result, which is smaller then the 1909 i tested but not by much and that is probably wear)the other key differance is the colour of metal, 1908/9 are always a lighter colour then other eddies, could this be a factor (metal compound?)

[Peter]

now i know, or at least heard about such things existing in the H and KN's with george V, but i have here, 2 similar grade pennies 1 of 1907 1 of 1909 (in aVF) put them one on top of the other i can feel a slight differance in the 2 when the 2 edges touch my fingers, and also visually, although the gap is well under 1mm hard to say, but the 1907 is slightly bigger then the 1909 (checked with a more worn example and same result, which is smaller then the 1909 i tested but not by much and that is probably wear)the other key differance is the colour of metal, 1908/9 are always a lighter colour then other eddies, could this be a factor (metal compound?)

There should be a slight weight difference.Have you got accurate scales?

[1949threepence]

now i know, or at least heard about such things existing in the H and KN's with george V, but i have here, 2 similar grade pennies 1 of 1907 1 of 1909 (in aVF) put them one on top of the other i can feel a slight differance in the 2 when the 2 edges touch my fingers, and also visually, although the gap is well under 1mm hard to say, but the 1907 is slightly bigger then the 1909 (checked with a more worn example and same result, which is smaller then the 1909 i tested but not by much and that is probably wear)the other key differance is the colour of metal, 1908/9 are always a lighter colour then other eddies, could this be a factor (metal compound?)

I've noticed that, certainly as far as the years immediately preceding them are concerned. Usually this will be due to the metal mix. The example that always springs to mind, is the 1918 and 1919KN being a very distinctive tan coloured shade, even when well worn. No blackening whatever.

When it comes to rim width, there are differences which occur. My 1881H seems extraordinarily thick, compared to all of its peers in the bun series (in my collection, leastways). Also, a thick rim acts as a protective barrier against wear, when the obverse and reverse fields are set, as it were, concavely into it. Conversely, a convex effect on one side, can lead to greater wear and a distinctive difference in obverse/reverse grade on the same coin.

[scott]

i have seen differant thicknesses in buns.