This rare original sikes hydrometer is in its original wooden presentation box lined in a green felt fully fitted original hinges and brass catches box features original name plate sikes hydrometer tobuss 49 mount pleasant st london wc1 dates from around 1920s 1930s the thermometer its self is in good condition but the glass is missing the thermometer was probably made bysanders sons london the hydrometer is in good condition has relevant serial number marked on the edge