Info request on 2 old calculators

From: GeorgeM
Email: gmasek@usit.net


I have two old calculators that I hope someone could tell me a little about. One is a Sharp Elsi Mate 827 "music plus calculator duet, music touch sound". The other is a Travellers model 880, it uses a 9 volt battery. I've had these packed away for many years and forgot about them. Any info would be appreciated. I think they're from the 70's.