In 2007, I read there were 78 known covers to exist.

Why do you consider IS obscure?,
pricing would suggest par status,
considering usage, one would expect a higher example.
"LA" = Lunatic Asylum, I would expect perhaps obscure,
or GT Goolwa Tramway, or NT Northern Territory.



"Asia-translation" wrote in message
...
I gather that these Departmentals are very popular here at the
moment. An obscure one like IS certainly ought to reach four figures
in $US.

Tony