Quote:
varnish lozenge pattern on the 1900 issue which has discoloured with age.
Nice detective work Nigel!
Further:
The postage design ink was printed over the varnish,
and any attempt to wash a postmark off would also
was the print off.
Example from when I was a newbie with Austria, when
I washed the gum from this stamp with similar but lined varnish.
