This is a clock made out of old 7 segment flip digit displays from obsolete Petrol Pumps (well, actually, not totally obsolete – they are still in use in many petrol pumps today!). I try to buy any old petrol pumps to salvage these wonderful displays.
The clock uses ESP32s development board and a Real Time Clock board (with battery backup). Also has a temp/humidity sensor and a buck/boost board to provide the voltage boost to power the flip digit displays.