English, "Rolling Ball" mantel clock, on older wood base. unsigned, (no glass cover)

English, "Rolling Ball" mantel clock, on older wood base. unsigned, (no glass cover) This heavy copy of the Congreve clock has a large fusee, the timekeeping governed by a steel ball rolling on a grooved table, releasing a latch at the end of its travel, allowing the train to advance while the table tilts to the opposite side end and the ball re-traces its original path in the other direction. The time is indicated on three elevated dials, minutes in the center, hours to the left and seconds to the right. The condition is very good but we have not tested its operation. Note there is no dust cover.