Details
A late 19th-Century circular calculator,
by GEBR.FROMME WIEN, the circular dial with ivorine cursor reading against an arc engraved for Sine and Cosine, mounted on a pine frame, in carrying case -- 12½in. (31.8cm.) wide
by GEBR.FROMME WIEN, the circular dial with ivorine cursor reading against an arc engraved for Sine and Cosine, mounted on a pine frame, in carrying case -- 12½in. (31.8cm.) wide