This astronomical transit (or meridian circle) with an "A. & G. Repsold / Hamburg 1850" inscription was purchased for use at U.S. Naval Academy in Annapolis. New, it cost $4705. It is almost identical ...

This astronomical transit is one of the original instruments purchased for the observatory that opened at Georgetown College in 1844. It has a 4.6-inch objective. The inscription probably reads "Ertel ...