Kolesch & Co. advertised this as an Engineer's Transit, No. 7650. The horizontal circle is graduated every 20 minutes, and read by opposite verniers with celluloid reflectors to 30 seconds. There is a clamp and tangent to the telescope. New, it cost $160. Heinrich Adolph Kolesch (1855-1903) was a German immigrant who began in business in 1885, taking over the firm that had been founded by E. & G. W. Blunt. Kolesch & Co. was still using the Blunt dividing engine in 1925. The firm was incorporated in New York State in 1904, and dissolved in 1947.Ref: Kolesch & Co., Illustrated Catalogue and Price-List (New York, 1913), pp. 228-229 for this type of instrument, and pp. 195 and 198 for the history of the firm.
