Marquardt Series 6180
Series 6810 is a keyboard switch series from Marquardt. They reported that this series was manufactured from 1983 to 1995. These switches are very rare, with only two examples discovered to date:
- Fametech Tysso PKB-080 POS keypad; no known date
- Olympia Carrera electric typewriter, presumably early 80s (pictures currently out of action)
The internals are not known, and may not resemble those of the successor series. The switches in the Tysso PKB-080 are clearly 6180 series, although they are not an exact match for the drawing of 6180.0101 provided by Marquardt.
- 6180.0101 engineering drawing, supplied by Marquardt