|Sense method||Metal leaf|
|Keycap mount||Alps mount|
USw LARB01 is an Alps clone switch from an unknown manufacturer. The switch is a derivative of old Tai-Hao APC series, with a wide steel click leaf and a copy of Tai-Hao's original stationary contact (long since replaced with a much smaller design of part).
Unusual design characteristics include a dark red upper shell (above a black base), notches in the front and rear inside edges of the slider, and no markings of any kind on the top of the upper shell. The only externally visible marking is a circled number in the centre of the base, seen from below; a similar number appears on the inside of the upper shell.
The switch is sharply tactile with a loud, precise click sound.