Help: What tranny do I have??

You are not telling us why you are looking at the numbers. Are you trying to determine if it is the original tranny for your car? That cannot be done on the early 4-speeds. They didn't start stamping VINs on the case until '67.
As JohnRR said, it is an early A, B&T, 23 spline 4-speed with a 3.09 first gear.