Need header ID help..

Killer6 said
OK, I have been as of yet, unable to match this serial/part # to the following;
Hooker
Casler
Hedman
Dougs
Doug Thorley/Thorley
Blackjack
Sanderson
Stahl
Jardine
Gebler
Cyclone
Any other ideas out there?

Appliance. I could recognize them by the four bolt collector flange. I don't remember if they were round or square.