Thanks to all who responded, and I enjoyed the levity!  I have read all and am responding to a "suggested nugget" of info.
The set consists of:
the Santa Fe  EMD GP 40 Diesel, the Santa Fe caboose, a Georgia Pacific 51' pulpwood car, a Georgia Pacific 48' car with logs, a HD 51' box car, (Coronet Paper Products, a power pack, box of 36 pieces of signs and telegraph poles,, and a box of track.
Someone has written "Dec. 1987 on the original shipping box. 
Does this info help in the dating?
Thanks to all for any  and all feedback.

Hello to all, I have a pretty simple question, I think.  I'm trying to identify the age of a Bachmann HO set  I just aquired.  It is a Georgia Pacific complete set, with the Item number of AA 40-0440C
If this is not the correct forum, could you please help me find the correct place?
thanks,
Banjopicker