This is definitely tidier than the mechanical keyboard I had for my ZX81—build by a friend in the early '80s and purchased by me circa 1994!—which had keycaps w

This is definitely tidier than the mechanical keyboard I had for my ZX81—build by a friend in the early '80s and purchased by me circa 1994!—which had keycaps which were more or less photocopies of the picture of the keyboard in the manual that had been photocopied and glued onto the keys of some ancient surplus terminal keyboard, with a healthy dose varnish to protect the paper on top and a lot of kludging of the PCB underneath to configure it to scan the same as the ZX81 membrane keyboard.