Headphones
for Crystal Sets
5
- RN - 1,000 Ohm headphones. Manufacturer unknown
(there is RLT logotype though).
6
- Headphones made by Hagenuk Kiel, Germany.
Impedance 2,000 Ohm.
7
- IDEAL - Headphones made by Blaupunkt, Germany.
Impedance 4,000 Ohm.
8
- TRIMM FEATHERWEIGHT - 4,800 Ohm headphones made
by Trimm, Inc., Chicago, USA.
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