Bought this 7670 MANY years ago, maybe 20, will see if I have a record of purchase to see what year.  It is a learning experience, may be wrong so GRETSCH PROFESSIONALS please correct me.  Some GRETSCH material is posted, think, but not sure they apply.   

All electronics appear working, used & old, some pots (potentiometers, electronic controls) dirty/scratchy. 

Case has scuffs, metal tarnished.

Getting ready to sell all my guitars, in my warehouse, inspecting, cleaning, testing.

Ask your questions, will inspect and supply more information and pictures.

Nice guitar for almost FIFTY (50) YEARS OLD.

... and oh, per the sticker, MADE IN USA.