What is a Greco guitar?
Greco guitars are usually equipped with a tailpiece, a bridge and tuners manufactured by Gotoh. The Greco pickups, meanwhile, were manufactured by Maxon for instruments of the 70s (UD, U-1000 and U-2000 for example) and early 80s.
Was ist Greco?
GrECo, matter of trust. Die GrECo Gruppe betreibt 60 Niederlassungen in 16 Ländern mit ca. 1.000 Mitarbeitern vom Unternehmenssitz in Wien aus und ist mit GrECo nova in über 200 Ländern global vertreten.

What do the serial numbers mean on the pickups on Greco guitars?
The serial numbers of the pickups on Greco guitars The serial number of the Nisshin Onpa (Maxon) pickups mounted on the Greco and Ibanez guitars are composed of 5 digits until 1977. The Ibanez Super 70 pickups are the same as the Greco U-1000 or U-2000 pickups and their serials are identical. First digit = Nisshin Onpa pickup code (Maxon) (1, 2)