I didn't want to hijack the Peru thread, but I have a question about Specimen Stamps.
Specifically, Smauggie said
These are stamp specimens. That means that they were produced as a test, to see how they would look. The "SPECIMEN" overprint testifies to that fact.
Smauggie is smarter than I, but I'm not sure I agree with that statement. I think he is describing TEST stamps or maybe even PROOFs.
I thought -SPECIMEN stamps were provided to other country's postal administration as "examples" or "specimens" for identification purposes.
Can anyone give me more details.