Marquardt custom switches for Olympia
According to Marquardt, this switch was a custom product made for Olympia for their typewriters, of which no data still remains at Marquardt. Its design is a hybrid between the the “butterfly” switch (confirmed here to have been in use in 1982) and Series 6184, suggesting possibly a compromise to allow the new switch mechanism to be used in a tall keyboard assembly until a complete typewriter redesign was completed. Olympia most definitely used Series 6810, which does suggest that 6810 was internally similar to 6814. If the photographs of the Series 6180–based Olympia Carrera typewriter become available, we may get a date for these switches, which will help with understanding the product timeline.