3v (2x AA batteries).
Display is 8 digits, green vacuum fluorescent.
4 functions, %, memory, square root.
78 x 136 x 26 mm. (3" x 5.4" x 1").
Made in Japan.
The label on the rear says "Supplied exclusively to W.H. Smith by Decimo".
W.H. Smith is a British chain of newsagent, book, stationery, and music stores.
The circuit board with NEC uPD278C integrated circuit and vacuum fluorescent display in a single tube.
© Text & photographs copyright Nigel Tout 2000-2017 except where noted otherwise.