Nepro “Memotron”

Swiss Watch Fair 1972 - BF 251
Here is one of the important new designs at the 1972 Swiss Watch
Fair the world’s first high-frequency (28,800 v.p.h.) alarm wristwatch with automatic winding and electronic buzz. It emits a very powerful signal during 5 minutes Furthermore, it is efficiently water-resistant. The movement, buzz mechanism and battery are housed in independent watertight caissons Quick-change date setting calendar with “stop second” system. (NEPRO “Memotron”)