Details
A Conto calculator,
by J. Amund, Zurich, with eight dial-operated digit displays, release lever and brass case with remains of leatherette covering -- 12in.(31cm.) wide, in leather-covered case
by J. Amund, Zurich, with eight dial-operated digit displays, release lever and brass case with remains of leatherette covering -- 12in.(31cm.) wide, in leather-covered case
Further details
See Front Cover