Es gibt wohl noch Spezifikationen in Form von Buchstabencodes. Unter
http://www.pinchingyourpennies.com/forums/showthread.php?t=46994 fand ich folgende Beispiele, die jetzt zwar nicht das BH auflösen, aber zumindest vielleicht die Richtung weisen, was es bedeuten könnte:
Planters Peanuts (1-800-622-4726)
CODE will indicate expiration date.
Example: 0209
A4 (translated: July 27, 2000)
0 = year = 2000
209 = 209th day of 2000 = July 27
A4 = plant informationUncle Ben's (1-800-548-6253)
CODE will indicate the date the food was packed.
Example: 823
AB (translated: June 1, 1998)
8 = year = 1998
23 = 23rd week of 1998 = week of June 1
AB = plant informationSELF LIFE Product (unopened) is good for 2 years from the packing date (i.e., June 1, 2000)