Well, for what it's worth, my first Alembic (ordered directly from Alembic and received in June, 1976) had what is NOW referred to as Series II electronics - it's serial # was AC 76 405. At the time of ordering it, Sam Field (the main point person regarding my bass) turned me on to the option of having a Master Volume and CVQ's added to the standard electronics package for an additional $100 - my, how things have changed! But I was hardly the first customer to go for that option back then!