Huge Antique Brass Regulator Grandfather Clock Movement Howard Seth Thomas Era

Up for sale is this Huge big and bad Antique Brass Regulator or Grandfather Clock Movement. It’s unsigned, weighs just under 6 pounds with big thick plates and a very large spring. I would guess it’s longer duration than 8 days but who knows. Plates measure about 7″ x 5 3/4″. Shows rust to non brass parts, I was able to crank the winding arbor and didn’t feel anything funny, otherwise untested. Please view all 12 photos to help judge condition.