English lantern clocks are a form first appearing about 1620, probably derived from the design of weight-driven continental iron clocks from the late 16th century. Lantern clocks were possibly the most widely made household clock in England over 150 years, but today they survive in very small numbers, and seldom without extensive restoration and modification. Boreham's clock is relatively untouched, with replacement only in the brass frets atop the case. Lantern clock cases are essentially a brass frame made of four vertical posts, horizontal plates top and bottom, and brass plates and a dial to keep out the worst of the dust. The side plates are hinged and latched for access to the movement.
All components are of cast brass, pounded flat and filed to a finish where surfaces are visible.
On this clock, the only modification to the case appears to be a repair to one hinge pin. The dolphin front fret and the side frets appear to be proper replacements, with old mounting holes plugged in the plates. Hoop and spikes are original. The oak mounting bracket is modern. The single hand, virtually standard for lantern clocks, appears to be original.