Mitsumi KQK Type

KQK is an obscure keyboard type from Mitsumi that is known only from a single description in Dempa Digest from 1990. As shown on Google Books, the type was described in Dempa Digest as follows:

Mitsumi Electric has begun mass production of a KQK keyboard switch for laptop and personal computer applications. Initial monthly output of 10,000 units will be increased to 30,000 units this August. Adopting a double membrane design for increased dust resistance, the switch is guaranteed for 30 million operations. In addition, its chip diode can roll over the N key and it has a one-body construction with height of 20mm.