The first Hallett suppression system's were made for the Navy in WWII, to keep the ignition noise out of military Radio's. They were made of a heavy cast aluminum. Started use in July 1944 on MZ-2 Radio Jeeps.
Phinney 55 179.jpgPhinney 55 181.jpgTags 012 (Small).jpg
Phinney 55 179.jpgPhinney 55 181.jpgTags 012 (Small).jpg