725-3771-UK (Week 28, 1992), has Pink ALPS.
725-3770-US date 01. 1992 and 06. 1993 both has Pink ALPS.
didn't take any record or Pic for Orange one.
Just as a matter of interest, the lock keys (LED's built into the caps), have Yellow Alps. These are soft compared to the Pinks, and have no discernable tactile point or click. Ugh.
Ripster, people usually call yellow ALPS seen in Caps Lock and Scroll Lock in Wang 724s and some Zeinith ZKB-2s as *Yellow* ALPS.
Basically ALPS Yellow =Linear with a ditch for LED as like as Green.
You'd better to classify those switches with clicking leaf found in APPLE IIc recently under another color sec. To my eye the color is a mixture of orange and yellow and different from yellow stems seen in ALPS linear switches.
Perhaps we need to define colors, especially for orange, pink, yellow and that used in APPLE IIc.