The Black & White Clock is like that, only it’s digital. The clock consists of numbers only: no case, no background, no nothing. Four OLED shapes mimic \[…\] ...

The clock doesn’t have a 50 year run time because the batteries it’s designed to run on will self discharge in about half that. I’ve no idea what kind of battery could really last 50 years.

Arduino users may be interested in a new mini OLED display created by Rabid Prototypes which combines a 32-bit 48MHz ARM Cortex M0+ micro-controller ...