I have a 1976 Serial # 263 bass. The body looks like a series I but the controls are laid out like a series II.
 
Here is a picture for Mica to look at and give me the real skinny on it.

Looks like a Series I to me. There are no CVQ (Continuously Variable Q) controls, yours appears to have the 3 poistion Q switches, which would make it a Series I.
 
Matt

The electronics are Series I and are arranged typically for a bass of its age.  
 
We'll investigate the instrument file for you soon to see what else there is to know about this bass.

Hi Edward,
 
welcome to the site!
It's a beautiful bass.
And a very nice picture too!
 
Paul