Brass Torpedo Log Taffrail log was the nautical mechanism used to measure speed in knots and miles per hour. Fisher-Pierce Co., Duxbury, Massachusetts. A pine box housing the Torpedo Log is included. Brass gauge and torpedo spinner. Perhaps a riverboat wheel.
Inner wheel has an inset brass circle.
Wheel has 8 spokes. Legs added to make coffee table. Thick glass top covers inner wheel. Knob in center moves a pointer to the point of greatest heel of the vessel. Probably WW II vintage.