A Little Help With Scott Catalog Back Of Book Listings

A have a couple of Officials I'm working with and new to these. I cannot find what this ' D ' designation means and where it's explained in the catalog. I have the 2019 issue US Scott Specilized Stamps & Covers. I believe it's for the Illustration image, but not sure. Can someone point me in the right direction?





PS I I do not have this stamp…..

It refers to the font of the word specimen. If you look at the beginning of the Specimen section, it will show the different fonts for the overprints. D is printed in a line with capital letters as opposed to a script font/style on a slant.

Ok. Missed that one. Thank you.

The specimen stamps can be fun. Getting all the 1 and 2 cent ones is challenging but not impossible.

When I wanted a project I could focus on a few years ago, that was what I chose. Even the most common 1c isn't all that common, but they're affordable.
Along the way I was lucky to pick up a couple nice plate varieties, and happened to come across a series of articles about plate varieties on the officials.

Still occasionally add one here and there, but I have most of the ones I can afford, and was lucky on a few I normally couldn't.