NEC APC-H4124D
NEC Blue Slider, Double-Injection Keycaps, 1988

This is probably one of the rarest keyboards in my collection. The NEC APC was an AT standard keyboard using NEC's own tactile and clicky sky-blue colored switches. Made in Japan, this keyboard series was first released in the mid 80s and remained in production until the early 90s. The sample I own is sadly quite yellowed and has seen a fair bit of use on the keycaps.

The keyswitches in this one have a very soft activation point and a light click. They feel softer than Cherry MX Blue switches and probably activate at about 30g, with the click following later at about 50g. Since with most other clicky keyswitches the initial click happens at the very same moment as the switch activates, these NEC sliders can be quite strange to type on at first. Once you get used to unusual activation and very light touch these switches are pretty nice to type on. Compared to Cherry MX Blue switches or ALPS white/blue these switches are much more quiet and a bit higher pitched.