Ratcatcher post

I was thinking I was wearing my ratcatcher here, but doesn't look like it.  A ratcatcher is a special shirt worn by equestrians for dress up I guess is the best way to describe it.
This picture was taken in Festus, Missouri in about 1974.  It's me and my dad.  The horse is Carrigan, I was told he was a descendant of Man of War a famous race horse.