via this auction.
"Rare digital watch made by Seiko called FREQUENCY.
FUNCTIONS: chronograph, alarm, calendar, metronome, BPM counter and built in DRUM MACHINE!!!.
( metronome, 6 rhythm patterns and swing on/off etc.)
Ideal for musicians, DJ's and collectors.
Has 2 displays on the watch. One is LCD on the front, the other is red LED on the top.
Colour is BROWN."
Other colors on Ebay here.