The Acousticon Model A-335 transistor hearing aid was produced by Dictograph Products Corporation of New York, NY in 1953.
The 3-transistor Acousticon Model A-335 had a gold anodized aluminum case and measured 3 1/16” x 1¾” by 13/16” (7.8 x 4.5 x 2.1 cm). It weighed 2.8 oz. (78 g) without the batteries.
William says
Looking for information on model A – 3000
Looks similar to A – 335
Neil Bauman, Ph.D. says
Hi William:
The Acousticon model A-3000 came out in 1954. It was a 3 transistor hearing aid with a gold anodized aluminum case. The microphone grill was two sets of 5 slots in the upper right front slanting down to right. It used an RM-12 mercury battery.
Cordially,
Neil