细节
A brass mining dial
by Keuffel & Esser Co., New York, No. 9305, with twin detachable sights -- 14in.(36cm.)long, in fitted wood case; a tripod; and a Picht braille typewriter in case (3)
by Keuffel & Esser Co., New York, No. 9305, with twin detachable sights -- 14in.(36cm.)long, in fitted wood case; a tripod; and a Picht braille typewriter in case (3)