This stamp has been used on a receipt, I think. The letters SRDC must
stand for S— R— District Council, a local authority somewhere in the UK.
I’m not sure what place name the SR might stand for. Local councils
often overprinted their stamps for this...
Great detective work. I hazarded my guess because the same sort of thing
plagues Japanese Occupation of Burma material. After the defeat of the
Japanese the genuine cancellers were pretty much rented out at the GPO
to whoever wanted to backdate repri...
Er, because the lower cover was made up retrospectively, some years
after the date, with a “borrowed” canceller, to satisfy collector demand
for fdc’s?
What a great shame. Very sad. I always enjoyed his posts, which had such
an engaging bite, but you knew that behind that sharp edge was a clever,
knowledgeable and humane person, deeply devoted to his vocation of
teaching. And a fine philatelist!