Bidspirit auction | H.R. PEARSON SIGNED PORTLAND SURVEYING
H.R. PEARSON SIGNED PORTLAND SURVEYING GRAPHOMETER. - Brass and mahogany. On a later stand together with two period tripods. Width 9 inches. CONDITION: Good antique condition. Expected wear.
H.R. PEARSON SIGNED PORTLAND SURVEYING GRAPHOMETER. - Brass and mahogany. On a later stand together with two period tripods. Width 9 inches. CONDITION: Good antique condition. Expected wear.