Minifon tape
AKA
        
    Protona Minifon Attaché
    Era
        
    1959–1967
    Format
        
    analog
    Developed by
        
    Monske & Co GmbH 
    (Max) Capacity
        
    2 hours
    Size
        
    11 × 7.8 × 1.15 cm
    Fun facts
    - Like its predecessor, the Minifon wire, this format was intended for covert recording
- The tape closely resembled the Compact Cassette format but was its own unique design
- A microphone in the shape of a pen was included with purchase of some recorders