1862 London Exhibition: Catalogue: Class VIII.: B. A. Grautoff
From GracesGuide
1865. GRAUTOFF, B. A., and Co., 4 Lime Street Square, E.C.
Steam and vacuum gauges and salinometers.
Grace's Guide
British Industrial History
1865. GRAUTOFF, B. A., and Co., 4 Lime Street Square, E.C.
Steam and vacuum gauges and salinometers.