Well I guess inflation has pushed it up $2.
Like the Mustang, the Stallions had two different styles. The earlier models had no "horns" or integral stableisers. They were made semilar to a grizzly or Pearson hunter or Red Wing hunter. The later models had the intgral stabelisers semilar to the later Colt,
Ben Pearson experts might be able to date it by serial numbers but we really need pictures.
Integral stabelisers = mid '60's and later.
No inegral stabelizers = early '60's
But that is just my best guess.