S1 Tomb of Horrors by Gary Gygax
S2 White Plume Mountain by Lawrence Schick
S3 Expedition to the Barrier Peaks by Gary Gygax
S4 Lost Caverns of Tsojcanth by Gary Gygax

These four were later (weakly) combined into supermodule:

S1-4 Realms of Horror

S3 Expedition to the Barrier Peaks comes with a double cover (module booklet nested inside two covers of maps).  Thanks to Eric Pass for this info.

S4 Lost Caverns of Tsojcanth has its own page; follow the link.

Modules S5 Dancing Hut of Baba Yaga and S6 Labyrinth of Madness were planned as 1st Edition AD&D modules, but not actually released until 1995 (and then without module codes).  (Thanks to Adrian Newman for this info).

Printing Information

S1 Tomb of Horrors

• First (1978):  Monochrome.  Wizard logo, offset left.  No ISBN.  Two booklets; one has module text, the other has illustrations.  Back cover has prices listed for items.  Thanks to Michael Deaton for help with this info.
   
• Second:  Monochrome.  Wizard logo, centered.  ISBN on front cover bottom left.  Two booklets; one has module text, the other has illustrations.  Booklets have copyright date (1978, TSR Games) above address; there is no "Distributed to the toy and hobby trade by regional distributors" line above address.  Back cover has no prices for items.  Thanks to Michael Deaton, Chris Hoffner, and Rhea Shelley for this info.
   
• Third:  Monochrome.  Wizard logo, centered.  ISBN on front cover bottom left.  Two booklets; one has module text, the other has illustrations.  Copyright date (1978, TSR Games) moved to the bottom right corner below the starburst; a third line of text has been added above the address: "Distributed to the toy and hobby trade by regional distributors."  Back cover has no prices for items.  Thanks to Michael Deaton for this info.
   
• Fourth:  Green color cover.  TSR Face logo.  ISBN on back cover bottom left.  Single booklet.  Has the line "The designation 'TM' is used to refer to trademarks owned by TSR Hobbies, Inc.  All rights reserved" above the starburst on the front cover.  The TSR address on the cover is in a non-italicized font.
   
• Fifth:  Green color cover.  TSR Face logo.  ISBN on back cover bottom left.  Single booklet.  Has no trademark notice (see Fourth print) above the starburst on the front cover.  The TSR address on the cover is in an italicized font.
   
• Sixth:  Green color cover.  TSR Face logo.  ISBN on back cover bottom left and Product Number on back cover bottom right.  Single booklet.  Has no trademark notice (see Fourth print) above the starburst on the front cover.  The TSR address on the cover is in an italicized font.
   
• Seventh (1999):  Monochrome.  Wizard logo, centered.  ISBN on front cover bottom left.  Single booklet.  TSR should have placed a TSR Silver logo on this module, as they did with other Silver Anniversary reprints, but they did not -- notice that the difference between this print and Second / Third prints is solely the presence of the single booklet.  This print was available only within the Return to the Tomb of Horrors boxed set released by TSR in 1999.  It did not come shrinkwrapped. (Thanks to Bruce Robertson and Jeremy Simmons for this info, and to Bruce Robertson for the scan).

S2 White Plume Mountain

• First (1979):  Monochrome.  Wizard logo.  No ISBN.  "Printed in USA" is in the bottom left corner of the front cover. 12 pages.
   
• Second:  Monochrome.  Wizard logo.  ISBN on back cover bottom left only.  "Printed in USA" is in the bottom left corner of the front cover. 12 pages. (This printing is unconfirmed).
   
• Third:  Monochrome.  Wizard logo.  ISBN on back cover bottom left and front cover bottom left.  "Printed in USA" is now centered underneath the Wizard logo.  12 pages.
   
• Fourth (1980):  Orange color cover.  TSR Face logo at the bottom is slightly offset from left (when compared with later printings).  ISBN on back cover bottom left.  Three-line angled yellow banner in upper left corner.  States "Advanced Dungeons & Dragons is a trademark owned..." on the cover.  Has the TSR Product Code (9027) on the front cover, bottom right.  16 pages.  (Thanks to John Kozol for this info and the scan).
   
• Fifth (1981):   Orange color cover.  TSR Face logo at the bottom is aligned left.  ISBN on back cover bottom left.  Two-line angled yellow banner in upper left corner.  States "Advanced Dungeons & Dragons is a registered service mark owned..." on the cover.  Does not have the TSR Product Code (9027) on the front cover, bottom right.  16 pages.  (Thanks to Alain Bennett for the scan).
   
• Sixth:  Orange color cover.  TSR Face logo at the bottom is aligned left.  ISBN on back cover bottom left.  Two-line angled yellow banner in upper left corner.  States "Advanced Dungeons & Dragons is a registered service mark owned..." on the cover.  Now once again has the TSR Product Code (9027) on the front cover, bottom right.  16 pages.  (Thanks to Adrian Newman for the scan).
   
• Seventh:  Orange color cover.  TSR Face logo at the bottom is aligned left.  ISBN and Product Number (not Piece Code) on back cover bottom left.  Two-line angled yellow banner in upper left corner.  States "Advanced Dungeons & Dragons is a registered service mark owned..." on the cover.  Has the TSR Product Code (9027) on the front cover, bottom right.  16 pages.
   
• Eighth:  Orange color cover.  TSR Face logo at the bottom is aligned left.  ISBN and Piece Code (not Product Number) on back cover bottom left.  Two-line angled yellow banner in upper left corner.  States "Advanced Dungeons & Dragons is a registered service mark owned..." on the cover.  Has the TSR Product Code (9027) on the front cover, bottom right.  16 pages.
   
• Ninth:  Orange color cover.  TSR Face logo at the bottom is aligned left.  ISBN, Product Number, and Piece Code all on back cover bottom left.  Two-line angled yellow banner in upper left corner.  States "Advanced Dungeons & Dragons is a registered service mark owned..." on the cover.  Has the TSR Product Code (9027) on the front cover, bottom right.  16 pages.
   
• Tenth (1999):  Has the TSR Silver logo in the bottom left corner.  Identical in all other respects to the Third print.  This print was available only within the limited-edition Silver Anniversary Collector's Edition released by TSR in 1999.  It did not come shrinkwrapped.

S3 Expedition to the Barrier Peaks

A word of caution on this printing sequence: TSR seems to have done a real mix-and-match job with this module. Our best guess is below, but we're still not sure we've got it right. Any and all clarifying info is appreciated!

• First (1980):  Wizard logo on exterior cover and interior booklet covers.  First line at the top of the cover is the module title, "Expedition to the Barrier Peaks".  Angled-yellow banner in upper left corner is three lines of text ("For Advanced D&D Game").  ISBN on back cover bottom left.  Maps (on interior covers) in black ink.  Illustration #41 is by Jeff Dee (signed "D' 80").  Illustration #45 is of the main deck (by Roslof?), and all subsequent illus. are shifted by one in their numbering sequence (i.e., the module references illustration #51, but it's actually #52).  Thanks to Michael Deaton and Gerald Sherfy for help with this info.
   
• Second (1981):  TSR Face logo on exterior cover, Wizard logo on both booklets.  Module title on cover (this and successive printings) is in a smaller font size than the First printing, and is now placed beneath a line stating "Dungeon Module S3".  Angled-yellow banner in upper left corner is now two lines of text (still "For Advanced D&D Game").  ISBN on back cover bottom left.  Maps (on interior covers) in black ink.  Illustrations #41 and #45 are now by Erol Otus in this and all later prints (viewable here).  The original illustration of #41 (by Jeff Dee) was swapped out for an unknown reason; the original #45 was deleted, the replacement Otus art numbered #44a, and the numbering of subsequent art corrected in order to match the module text references.  Thanks to Jim & Debbie Hunton for help with this info.
   
• Third:  TSR Face logo on exterior cover and both booklets.  Angled-yellow banner in upper left corner is now back to three lines of text.  ISBN (only) on back cover bottom left.  Maps in black ink.  (Thanks to Adrian Newman for this info). Thanks to Michael Deaton, Curt Gould, John Hall, Bruce Probst, Gerald Sherfy, and David Silberman for this info, and to David Silberman for the scans.
   
• Fourth:  TSR Face logo on exterior cover and both booklets.  Angled-yellow banner in upper left corner switches, once again, to two lines of text.  ISBN (only) on back cover bottom left.  Maps in black ink Thanks to Michael Deaton and Curt Gould for help with this info.
  
  
• Fifth:  TSR Face logo on exterior cover and on adventure booklet; Wizard logo on interior illustration booklet (Note:  TSR used the earlier Wizard-logo illustration booklet -- from the Second print -- with this print!).  Angled-yellow banner in upper left corner is two lines of text.  ISBN and Product Number on back cover bottom left.  All maps in blue ink.  Thanks to Neville Ridley-Smith for help with this info.
   
• Sixth:  TSR Face logo on exterior cover and both booklets.  Angled-yellow banner in upper left corner is two lines of text.  ISBN and Product Number on back cover bottom left.  All maps in black ink.  Thanks to Rene Hurka and Michael Deaton for help with this info.
   
• Seventh:  Contents identical to Sixth, but has a cardboard header glued to the top of the module, with the D&D logo and some other advertising.  The module itself, separated from the header, is indistinguishable from a Sixth printing.  Thanks to Mike Kuo for the scan.  Further info on header modules is here.
  
  

Tomb of Horrors (1st print)	Tomb of Horrors (2nd print)	Tomb of Horrors (4th print)	Tomb of Horrors (5th-6th print)	Tomb of Horrors (7th print)
White Plume Mountain (1st - 2nd print)	White Plume Mountain (4th print)	White Plume Mountain (5th print)	White Plume Mountain (6th-9th print)	White Plume Mountain (10th print)
Expedition Barrier Peaks (1st print)	Expedition Barrier Peaks (2nd, 4th-6th print)	Expedition Barrier Peaks (7th print)