David,
Beautiful 508! I was just thinking about how fun it would have been to be a collector and in a club with others back when Jim Kirby was alive and still designing Kirby's. I don't know how accessible he'd of been but I can imagine some of the questions,comments and suggestions he'd receive from collectors.
I wonder how often his neighbor actually used his 508 as opposed to someone who did the house cleaning for them? I've seen photos of where Mr. Kirby resided and if his
neighbor's place is similar I wouldn't be surprised if there were multiple Kirby's through out the house...just saying!