EditorialA dial map measurer, unsigned, but attributed to one of the Frodsham family of watchmakers. Also, a divider, written note and map. Map meter. Ca. 1840. The dial map measurer is 55mm. in diameter. Map distances measured by the rotating wheel are transmi...
EditorialA dial map measurer, unsigned, but attributed to one of the Frodsham family of watchmakers. Map meter. Ca. 1840. Map distances measured by the rotating wheel are transmitted to the dial hands which give readings in miles, chains, furlongs and hundredth...