[Hallicrafters] International Crystal AOC

[Don Stalkowski]

I know this is off-topic but perhaps the learned gentlemen
of this group could help me in locating information on the
International Crystal AOC modules.

These were the tube based modules manufactured circa 1963.
Some module numbers were OS-2, RE-3, MX-2, MU-2, and PO-2.

73, Don VE3HUR