Details
An unusual hand-held oxidised-brass framed air-flow meter,
with eight-bladed aluminium fan and ivorine-faced dial inscribed ÖSTNAN PATENT, the handle stamped R. GRAVE A.B. STOCKHOLM NO. 1088 -- 8¼in. (21cm.) long; and a lacquered and oxidised-brass combined compass/clinometer, the silvered dial inscribed FR. J. BERG STOCKHOLM NO.9178, the compass needle with unusual screw-adjustable balance, with suspension ring, in fitted plush-lined leatherette-covered case -- 4.7/8in. (12.3cm.) wide
See Illustration (2)
with eight-bladed aluminium fan and ivorine-faced dial inscribed ÖSTNAN PATENT, the handle stamped R. GRAVE A.B. STOCKHOLM NO. 1088 -- 8¼in. (21cm.) long; and a lacquered and oxidised-brass combined compass/clinometer, the silvered dial inscribed FR. J. BERG STOCKHOLM NO.9178, the compass needle with unusual screw-adjustable balance, with suspension ring, in fitted plush-lined leatherette-covered case -- 4.7/8in. (12.3cm.) wide
See Illustration (2)