1955
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| ®The Minifon “Special” |
1955
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This ultraminiaturized pocket wire recorder used tiny custom-made steel-wire bobbins for one hour of recording time. Battery-operated, it was originally fitted with miniature tubes. It was first developed in 1952 by Monske GMBH of Hanover, Germany. The basic cost was US$289.50. Classed as dictating machines in the 50’s, the Minifon recorders were the world’s smallest dictating machines, which certainly found their way into some clandestine applications as well. |
| Sample of literature- [1]-[2] |