|Basic Series (B1 - B12, BSOLO)|
Modules B1 - B9 were later compiled into supermodule B1-9 In Search of Adventure.
Some copies of B1, B2, B3, and B4 were 3-hole-punched at the factory.
The working title for B4 Lost City was "The Lost City of Cynidecia".
B6 Veiled Society includes cardstock miniatures and 16 pages of fold-together buildings.
B10 Night's Dark Terror is a "bridge" module between the Basic and Expert D&D sets. Includes a large, 2' x 3' fold-out map and 120 cardboard counters. Thanks to James Caldwell for help with this info.
B12 Queen's Harvest is the sequel to B11 King's Festival. The cover artwork would later be recycled for the cover of WGQ1 Patriots of Ulek (thanks to Raymond Lugo for noticing this!)
The 3-hole-punching on some of the early B-series modules does seem to indicate a different printing (probably earlier), but this is not proven.
The scarcity of these modules increases sequentially; modules B1 - B6 are fairly common, while B10 - B12 are somewhat rare. This is probably due to diminishing print runs as time went on.
B10 Night's Dark Terror has a UK version, which is identical in
all respects to the US version except it has a "B/X1" sticker over the "B10"
code on the front cover. TSR UK, who developed the module, originally
intended it to bear the B/X1 code (since the module is a bridge between
the Basic and
Expert sets), but were overruled
by TSR USA. The "B/X1" version is substantially rarer than the "B10"
version. (Thanks to Graeme Morris and Bill Wilkerson for this info).
Thanks to Leonard Riotto for the scans of B5 and B6, and
Newman for the scan of BSOLO.
The Fourth print of B4 Lost City (with the red banner) appears to be more rare than the other prints.
B10 Night's Dark Terror often fetches supermodule-high amounts at auction, most likely due to several reasons. As contributor James Caldwell notes, besides the normal 64-pg module booklet, B10 also includes a large fold-out map (approx 2' x 3') and 120 cardboard counters. A chapter of the module is a goblin siege of a homestead and the entire battle is played out on this remarkable map with the counters. Additionally, as Dan Gioffre states, B10 provides a good deal of Mystara information (specifically the Grand Duchy of Karameikos) that is available nowhere else -- a boon to Mystara fans.