Help With Locating Sample Overprints In 2013 US Specialized

I'm looking at perhaps beginning a collection
of SAMPLE and SPECIMEN... I'm having difficulty
locating SAMPLE in my 2013 Scott... any help
would be appreciated...

Thanks...
Randall

There should be a section "SPECIMEN STAMPS" in your Scott US Specialized Catalogue. I also recall that there are "specimens" in the "OFFICIAL STAMPS" section ... catalog numbers are prefixed with a capital O & suffixed with a capital S. Don't know if there are any others.
Ahah ... you were asking about SAMPLE, not SPECIMEN. I don't recall seeing SAMPLE stamps in Scott, but that doesn't mean they aren't there somewhere.

Hello, JL... thank you kindly for your reply...

I've located SPECIMEN in both locations,
however, I'm unable to locate SAMPLE...

Just looked in the "SPECIMEN STAMPS" section of my Scott ... there are some stamps labeled SAMPLE in that section. They begin around the year 1889.

Ahhh... there they are... towards the
tail end...thanks again... there's a
nice 190S I'm looking at which looks
like a decent start (pricewise)...