The clock is almost 7 1/2 feet high, 38 inches wide, and 28 inches deep. It weighs 400 pounds.

The upper part is made of cedar, the middle of mahogany and cherry, and the lower part of oak.

The face is a brass dial, 16 inches in diameter, with engraved numerals filled with wax. Four other dials show the seconds, days of the week, and months of the year. Two painted metal disks show the rising and setting of the sun and phases of the moon.

The clock's mechanical workings are weight-driven and supported on brass plated mounted on vertical iron straps. Its mechanical assembly can be removed from the case for repairs.

The carved wood figures of Jesus and the Apostles are just under 6 inches tall. The Apostle Peter wears a key around his neck. When the clock is wound, the Apostles parade once every half-hour. All bow to Jesus except Peter who turns his back. This alludes to the Biblical story of Jesus's arrest and trial. Three people asked Peter if he was one of Jesus's followers. Fearing for his life, Peter denied knowing Jesus, for which he later repented.

A drive-train with five wheels and a fan-fly power the Apostles' processions. The Apostles rest on a revolving 13-inch disk.

Most late 19th century ornamental clocks take their inspiration from the Strasbourg Cathedral clock of 1574.