thegetty:

Night Clock, 1704–5, Giovanni Battista Foggini and Leonard van der Vinne. The J. Paul Getty Museum
Night clocks had a dial illuminated from behind with an oil lamp so the numbers would be visible in a dark room. They never caught on, though, because keeping the lamp lit throughout the night required constant vigilance (which apparently does not promote restful sleep).

thegetty:

Night Clock, 1704–5, Giovanni Battista Foggini and Leonard van der Vinne. The J. Paul Getty Museum

Night clocks had a dial illuminated from behind with an oil lamp so the numbers would be visible in a dark room. They never caught on, though, because keeping the lamp lit throughout the night required constant vigilance (which apparently does not promote restful sleep).