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Got one 1/12th scale car from 1985/1986 with 2 Ko Propo PS51BS fitted for steering and mechanical speedcontrol. Someone knows this mini servo and what year it was released? I found some specs but no year.

Tested in May 1986, maybe at the year beginning in Japan:

http://www.retromodelisme.com/scan_pages/7914/mini-servos-pour-voitures-electriques-page-52.html

Bye Pierre

Thanks for the information. So maybe realesed that year or before. This makes sense as these Ko servos are used in a car from around 1985/1986.

got a few of these servo's they look very cool

These Ko servos don´t look any old or vintage to me even when they are vintage.
Also I didn´t knew before these Ko servos are existing. Just found them in this car.

very good stuff for vintage 1/12
PS 51BS servo are the top one on its year

Here my Old school electronics collection