Maker, James Arthur. New York, USA, 1901, serial number 1. Astronomical regulator with unique tri-dial design, Graham deadbeat escapement with Wagner rocking frame, 60-second remontoire, one second compensated pendulum, wheels and frame fabricated from bronze. Arthur made seven of these, this being the first and having a dedication plate in honor of his son Daniel Arthur, dated June 13, 1901. Three are known to survive ¹. Case dimensions 17.5"w x 81"h x 12"d.

1. In addition to this example, one is in a private collection on the East coast of the USA and one example belongs to the great granddaughter of Arthur's other son John Forbes Arthur and two are in the collection of the National Association of Watch and Clock Collectors (NAWCC) Museum in Columbia, PA.