Kevin,
I just bought a Pony and I was told it was made in the mid 50’s. I did some internet searching (as far as that goes) and I found that was about right. This one is 30 @ 28 with some reflex at the tips and appears to have been refinished since the Ben Pearson logo is no longer on the limb. Hope that helps.
I think all I did was type in Ben Pearson Pony and looked at several websites for the information.
Craig