As one of those mil guys hired in their 40s mentioned by Fangs (but no pension until 60 for me, 14.5 active 10 reserve) 763 is the closest to a "real" WB I get until 62-63 years old. Which will become 64-65 with 67.

Couple that with the fact that due to things that happened to me in my 20s, I'm statistically unlikely to make it past 60 with a medical and 50/50 at best for 70 on this side of the grass, 67 basically means the Pwb (probably wide body) goes from .2-.3 to 0-.05 between still holding a medical or even wabtibg to deal with a qual course at that age.