This is not about computers, but it's vintage tech so it's almost on topic... Just picked up a very cool miniature battery operated wire recorder and I need to find out what sort of battery it originally used - or at least to find out what voltage it takes so I can try it out. Also would like to find out more about it - date, original cost, etc. It's a Minifon Special, made by Protona (Hamburg, Ger.). The battery compartment measures 1.25 x 3.5 inches, with a flat, brass spring contact at either end. It's a beautiful little machine, in mint condition, complete with fitted pigskin case. Even the original spool of hair-thin wire is unbroken. Outside dimensions are 4 x 6.5 x 1.25 inches and it's finished in a sort of goldish-cream textured lacquer. There are two din sockets on the front, one with three pins for the mike (included), and another, unmarked, with nine pins. Anybody know anything about this little gem? Surely someone on the list goes back far enough to have seen one of these... R.