>Plastic heads fit perfectly. May have had a duco finish on it?
>From which period is the muffler?
You are a lucky man on the heads. Calf are the way to go for the best sound. Duco /natural finish no way to tell unless there are tell tale signs under the badge or lugs. Muffler looks late 30's. Hard to tell.
Fine drum. Enjoy.
Creighton