The blue one is a 39, or has a 39 'ft. clip'.
I always wanted one (when I was a kid) in the 50s. The 38 was my favorite. They were $75-$125 back then.
Today; they have problems with the 'stearing geomentry' (& shake) on the freeway and are $10,000+/-.
Be sure to 'road test' anything first.
Happy trails.