Join Date: May 2003
Location: Hilversum, The Netherlands
If it only has the two pickups it will be either of the following:
320, 321, 420, 421, 520, 620
Or, heaven forbid, a 120.
The numbers ending in 1 indicate a fixed bridge. Anything lower than 520 will have either an Edge Pro II ('03 models and newer), or a TRS thingie (older)
If it is made in Korea, it is probably a 32X. Japan, at least a 42X.
If it is a mahogany one with a quilted Sappely top, probably it is a 520QS. If it is NATO wood with a quilte Maple top, then it is likely a 620QM.
So, look at the back of the headstock, check out what year it was made (from the serial number), and where it was made (from the serial number or from a sticker/stamp on).
If none of the above helps, post a picture.
Also, I must have left some guitars off that list. Someone will correct me.