Tide gauge, used by Isambard Kingdom Brunel, made to his own specification by the predecessor of Negretti & Zambra, Regent St., used during launch of "Great Eastern" and probably during the building of Royal Albert Bridge, Saltash. Tide gauge, used by Brunel
Tide gauge by Lea Recorder Co. Ltd. of Manchester, No.9409/57, circa 1957. With float Tide gauge by Lea Recorder Co. Ltd. of Manchester 1957
USCGS portable tide gauge by Bausch and Lomb, c.1924 USCGS portable tide gauge by Bausch and Lomb 1924