TLF ID R6384
This is a close-up of a mechanical model of part of the solar system, commonly known as an orrery, made by renowned London instrument maker Benjamin Martin in about 1770. This bronze model features a cylindrical clockwork mechanism with an orb representing the Sun placed in the centre. Extending from this on an arm is a model of the Earth that is mounted on a tilt mechanism. The orrery stands 38.5 cm high and is 25.5 cm in diameter.