The following are my thoughts on the Modron books, along with a listing of the Judges Guild Widlerlands sets and maps; which I know Mike was interested in.
ALL of the Modron Books except for the 2nd Edition-4th Prints should include TWO maps.
One is 11" x 17" Judges Map and shows the Town of Modron on one side and The Estuary of Ragloroon on the other side.
The other is 8-12" x 11" Players Map and shows the Town of Modron and has (
IIRC) blank hexes on the other side (I did not dig out my copy to check).
From the Link that Shane provided in his first post above there is another link (the blue word Modron) to the BLUE Digest Sized Booklet "M", which is the original First Edition of the Town of Modron.
I know you (Mike) have at least one copy of Booklet "M".
It is the Blue Booklet with the sea serpent on the front cover; "Maelstron", the City States "Guardian of the Estuary".
I am not certain, but I think that (at least) the Judges Map (11" x 17") of Modron with the Estuary of Ragloroon on the reverse side would also go with that Blue Booklet (if not both maps).
There MIGHT be more than one printing of Booklet "M".
The larger books that were printed later showing the Town of Modron are all second edition books (Booklet "M" being the only first Edition).
They offer more details of the Estuary and the town itself; However, only the 2nd Ed-4th Print books have 32 pages, all others are 16 pages.
I do not have a copy of all printings of Modron (missing a 2nd Ed-1st and 2nd Ed-2nd) However:
The 3rd print covers are hard heavy stock and the books have 16 pages.
These 16 page books have NO inserted maps and the back cover is an illustration of a grinning man missing a front tooth walking along a dark alley with a bottle held up high (The man is Probably drunk) and a Vampire is shown in the background... apparently stalking his next meal.
These books would need the TWO separate maps to be complete.
The 2nd Edition-4th print covers are the thinner newspaper style and so they are more flimsy (in comparison) and the books have 32 pages including more artwork, data and BOTH maps are included inside or on the book itself.
The players smaller map (in full color) is actually the back cover, showing the general area of the town and the tower on the peninsula jutting into the Estuary.
The center fold of the book is the larger 11" x 17" Judges Map with the City of Modron side printed in full color and the Estuary Map in B&W on the reverse side.
These 4th print books do not include or need the separate maps.
To avoid any confusion (or perhaps to add to it) There is another Bluish Booklet that is Titled "Initial Guidelines Booklet K".
This is part of the Haghill set, but the data blog indicates the maps might not have been included with the installment or Booklet "K" but were sold seperately.
http://www.acaeum.com/jg/Item0020.html
I am certain that you (Mike) now have a stack of Haghill maps which show the town, the fortress and the area around Haghill (the Map is called Huberik of Haghill).
I believe that map can be included with other Judges Guild products as well, but I do not recall which ones (I think one of the City State Sets).
As for the Wilderlands Maps I have listed below; the Wilderlands Set Title with the corresponding
JG Product Code and what maps come with each set.
Wilderlands of High Fantasy (48.)
4 Maps; 2 Judges Maps and 2 Players Maps (2/3 and 4/5)
Fantastic Wilderlands Beyonde (67)
4 Maps; 2 Judges Maps and 2 Players Maps (7/8 and 9/10)
Wilderlands of the Magic Realm (92)
4 Maps: 2 Judges Maps and 2 Players Maps (12/13 and 11/14)
Wilderlands of the Fantastic Reaches (300)
4 Maps: 2 Judges Maps and 2 Players Maps (15/16 and 17/18.)
FYI:
Map One is the Campaign Map for the City State of the Invincible Overlord.
Map Six is the Campaign Map for the City State of the World Emperor.