Time for another addition to the collection, however it is not a typewriter or a calculator this time! Instead, i have bought a GPO Trimphone 722, the slim more modern counterpart to the venerable 746 dialphone. The trimphone is a bit battered but looks very nice, it is a shame i won't be able to make it ring out with it's warbling chirp chirp ring as i don't have a landline anymore, though my Mum does...
Update: I have tested it on Mum's landline. I even made a video which will be posted here at a later date...