Designer of a most precise electro-mechanic watch with isochrone pendulum Feodosiy Mikhailovich Fedchenko.
- Categories: Science & Technology
- Location: Moscow, Russia
- Event date: 23.04.1966
- Date published: 23.04.2018
- Credit: Sputnik
- Original: J66-8018, 35 mm film
- Media: JPEG, 5435x3543px, 5.7Mb