nice find. id say mid to late 60's vintage by the general look and the painted wheels, as a general ballpark guestimation, approxlimation. this is the second child seat like that i have seen around her today. cool seat, but it needs at least a few safety belts and other "tweeks" to make it safe.
i've been into old bikes since i was 18 (and am 32 now) and it is a great thing to be into. i can't quite describe it in words, but when your feelin it, you don't need words. ride on vinny. :mrgreen: