Details
Hartmann & Braun,
a late 19th century elektro-dynamometer with mahogany frame and lacquered brass fittings, the coil mounted between two pillars, the paper dial stamped Hartmann & Braun Frankfurt A/M No. 13, and additionally with supplier's label E. HARTMANN & WÜRZBURG - 11¾in. (29.8cm.) high; and a similar apparatus unsigned, the mahogany frame with brass terminals, coils, paper dial, the base stamped W=0.0226 4674, with original drum shaped leatherette covered card cover with swan-neck carrying handle - 14in. (35.6cm.) high, both instruments with brass laboratory labels (2)
a late 19th century elektro-dynamometer with mahogany frame and lacquered brass fittings, the coil mounted between two pillars, the paper dial stamped Hartmann & Braun Frankfurt A/M No. 13, and additionally with supplier's label E. HARTMANN & WÜRZBURG - 11¾in. (29.8cm.) high; and a similar apparatus unsigned, the mahogany frame with brass terminals, coils, paper dial, the base stamped W=0.0226 4674, with original drum shaped leatherette covered card cover with swan-neck carrying handle - 14in. (35.6cm.) high, both instruments with brass laboratory labels (2)