E.F.Johnson 115-510 "Speed key"
SPECIFICATIONS
| Type: | Vibrating keyer |
| Speed: | ? |
| Dimensions (W*H*D): | 70*?*152 mm (2.75*?*6") |
| Weight: | ? g (? oz) |
| Manufactured: | USA, 195x-19xx (Discontinued) |
| Other: |
Black wrinkle finish.
New price 1952 in the US: $8.10.
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