This Brock porkpie is from the late 1950s. The size tag is very similar to what was going into Stetsons and Mallorys of the period. I wonder if this was made under license or if it was just a coincidence.
It’s always nice when hats are actually dated. Eliminates a lot of guesswork. This hat was made by Poulton’s of Harrisburg, PA. Built to a standard not down to a price.