Collectors arcana: There is no definitive information about the history and purpose of these
sheets. Thus far, it has been speculated:
1. An in-house TSR staff item
2. A Gen Con 76 item
3. A promotional item for Greyhawk
4. A supplemental reference sheet for customers who ordered Greyhawk along
with the original Dungeons & Dragons boxed set
5. Printer's proofs
Rob Kuntz related on PiedPiper that he has a distinct memory of option #4.
The sheets, if RJK remembers it correctly, were to be added to the reference sheets already included in the boxed set.
In addition to the tables shown in the scan, the following tables are also
duplicated from the 1st printing Greyhawk plates:
MISCELLANEOUS MAGIC (Tables 1-5)
Other Statistics Regarding Thieves
Bonuses to Dwarves, Elves, and Hobbits as Thieves
WANDS, STAVES, AND RODS
Spells Table (Clerics)
MAGIC/MAPS DETERMINATION TABLE (SWORDS, ARMOR, MISCELLANEOUS WEAPONS,
SPELLS TABLE (Magic-Users)
Attack and Damage by Monster Type
All information and item scan by Kynan Connor, USA.