Yeah - the POH said to reset things for an over voltage but not for an under voltage. Of course being an early 70s POH, it is pretty light on information. I learned a lot about the electrical system with this event.... I learn stuff on almost every flight... some more than others.
Yep, no worries, you did fine, just fly and carry on and learn what you can from it. It is never incorrect to isolate and ignore a problem and fly the plane to a safe conclusion of the flight. You did fine at that.