Pete, You're probably one of the few people here that knows about them. I think I have a set?? will know tomorrow .. Straing looking heads. have the thermostat housings as well.
Gramps
Well the noticeable difference is ghd thermostat area of the head is at a 45 deg angal, and the thermostat housings are vertical. Neat looking head.. Can't find any information on them except they were the first ones made back in 48/49.
G
