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Dipleidoscope	Transit instrument	Troughton and Simms	Marine Chronometer
Nardin, Ulysse	Marine Chronometer	Biggs, Bryant	Marine Chronometer
Weichert, William	Frodsham, Charles	Marine chronometer	Marine Chronometer
Frodsham and Baker	Simmons, Joseph	Marine chronometer	Brockbank and Atkins
Marine Chronometer	Octant	Hughes	Berthoud, Louis