Casagrande liquid-limit apparatus, hand-operated with revolution counter to "BS 1377" ( 1967) with stainless-steel grooving tool by Leonard Farnell & Co. Ltd. (ser.no.9568/309) ( missing: height gauge) Casagrande liquid-limit apparatus 1967
wooden wheel, set into iron frame, with 'clock face' counter. Used on a waterwheel powering a papermill. manufacturer unknown. revolution counter used on a waterwheel