Great American's Re-Issue Scott #'s

I have the Harris Catalog, which apparently isn't as completely for US stuff as I thought it was. My Lighthouse album has the great american's series and then another page for the reissues, i'm trying to find the re-issue scott numbers for the following. I'm thinking maybe they all just have a letter at the end or something.

Perforations are all 11 1/4 x 11

2169 Untagged
2170 Untagged
2171 Untagged Blue Violet
2171 Untagged Grayish Violet
2173 Untagged
2175 Overall tagged
2175 Prephosphored Lake
2175 Prephosphored Carmine

2177 Overall Tagged
2177 Prephosphored
2179 Prephosphored
2181 Overall tagged
2181 Prephosphored
2187 Prephosphored
2188 Overall Tagged
2194 Overall Tagged
2194 Prephosphored
2196 Prephosphored

2943 Prephosphored Dull Violet
2943 Prephosphored Pale Violet

Thanks!

Whew! Here we go:
2169 Untagged ... 2169a
2170 Untagged ... 2170a
2171 Untagged Blue Violet
2171 Untagged Grayish Violet
Scott describes these as 2171a grayish violet & 2171b deep grayish blue
2173 Untagged ... 2173a
2175 Overall tagged ... 2175a
2175 Prephosphored Lake
Scott lists 2175c prephosphored (tagging appears solid) lake, dull gum
Scott lists 2175d prephosphored (tagging appears mottled) lake, shiny gum
2175 Prephosphored Carmine ... 2175e

2177 Overall Tagged ... 2177a
2177 Prephosphored ... 2177b
2179 Prephosphored
Scott lists 2179a orange brown, 2179b bright red brown
2181 Overall tagged ... 2181a
2181 Prephosphored
Scott lists 2181b prephosphored with solid appearance, dull gum
and 2181c prephosphored with mottled appearance, shiny gum
2187 Prephosphored
Scott lists 2187a prephosphored, dull gum and 2187c prephosphored with mottled appearance, shiny gum
2188 Overall Tagged ... 2188a
2194 Overall Tagged ... 2194a
2194 Prephosphored
Scott lists 2194d dark blue, prephosphored with mottled appearance, dull gum
Scott lists 2194e blue, prephosphored with mottled appearance, shiny gum
Scott lists 2194f blue, prephosphored with grainy solid appearance, low gloss gum
2196 Prephosphored ... 2196b

2943 Prephosphored Dull Violet ... 2943a
2943 Prephosphored Pale Violet ... 2943b

One other note. Don't know whether it will help much but all of the 2179b (Apgar bright red brown) come from plate # B3. Conversely, all B3 Apgars are 2179b.
In fact, all of the 2179 varieties are on prephosphored paper with the tagging appearing grainy solid. The varieties are:
2179 ... red brown (plates B1 or B2)
2179a ... orange brown (plates B1 or B2)
2179b ... bright red brown (plate B3)
Due to gradation in shading, there seems to me to be some overlap between 2179 and 2179a. If you find a plate B3 though, you know you have 2179b.

Thank you so much for the help! I think I need to pick up an older scotts catalog (I only collect to 1999), I saw this Harris one at the local hobby store and figured it would be enough to identify the stamps in my album.

I appreciate the efforts you put into this, as well as the additional information, it might make these a little easier to find!

Found one typo in my list. 2194d should read dark blue, prephosphored with a solid appearance, dull gum.

Since you don't have a Scott, you might try your public library. I usually photocopy a page or two out of the US Specialized at my library each year. The three Great Americans groupings are spread across 7 pages of my Scott. You could just photocopy those pages ... unless, of course, there are other series/stamps that you need to check on.

Thats a good idea. These are the only really confusing ones i've found so far and i've been through all of my albums finding the scott numbers of missing stamps. Most of the time I can search with the information on the pages and find the scott numbers but I wasn't able to find much information about the varieties in this series online. I've already spent my stamp budget for the month (i made it to the 2nd), so i'm probably going to have to wait a few weeks before picking these up!