It is the 1970s, established typewriter brands of course had to venture out into the exciting new world of the electronic calculator. This pleasing calculator was made in 1972 for the Litton Imperial Typewriter Company under it's Royal brand as the Royal Digital 5-M.
The calculator had five functions, the four basic arithmetic functions and percentages thanks to algebraic logic, and also had memory. The calculator had an 8 digit green vacuum fluorescent tube display.
The latest arrival in the collection of junk retro office equipment is this telephone. Now this may look like the dialphones i have already got but is in fact a GPO 706L! In future posts i will explain the differences between this and my 746s.
My Busicom 1210PD is a fine desktop calculator with a working printer... well it made a noise anyway but because the ribbon was completely spent i couldn't be sure on that score. I have fitted a new ribbon to the calculator, a pretty simple operation to be honest and can happily report that the printer works very well. Black and red ink is available, and it also prints lozenges!
