This is a good quality clock movement, almost certainly English, probably dating from the first quarter of the twentieth century. It has very heavy brass plates and wheels, high-count machined pinions, and a fusee, all signs of quality. The mounting of the pendulum (missing) at one end is unusual for a domestic clock, and it seems likely that the movement was part of some industrial device like an employee time clock. It has a recoil escapement. A fusee is a conical pulley driven (through a chain here) by the spring barrel. As the spring runs down, the chain acts at a larger and larger radius on the conical pulley, equalising the driving torque. This keeps the rate of the clock more even over the whole run.
It has motion work to drive an hour hand as well as a minute hand and the centre arbor is extended behind the back plate to drive some other mechanism.