Thanks Leigh
I do have Johns tombs but could not find any reference to actual size and or variations.
I have Bruno Boulanger's book, WW2 British Formation signs and it does show variations and a small theatre made round bullion (35cmx35cm) made for officers with the crossed keys and a similar colour, sky blue to my one.
It mentions (round badge p 171) was worn under Occupation Force badge and that the 1945 pattern was worn after the war when 5th Infantry Bde left the division to be part of BCOF Japan.
Maybe the one I have was for OR?
You might be on the right track Leigh.
Mike, me thinks size might matter in this case
Phill