Catalogue of O.D. Pierce & Co. manufacturers of and dealers in electrical supplies ... (1893)
O. D. Pierce & Co. · O. D. Pierce & Co. · leaf 46
THE LUDW1G MECHANICAL TELEGRAPH INSTRUMENT. A mechanical set for learners, requiring no battery whatever. It has a full sizekey, a complete set of adjustments and provided with special resonators that ^ivethe correct sounderclick to the instrument. Made in bronzed iron finish; also inbrass, nickel… … LUDWIG MORSE TELEGRAPH INSTRUMENT. gj£ This set is ihe invention of an old time and experienced telegrapher and is themost practical, neat, compact and effective combination set on the market. It isequipped with a full set of adjustments throughout. Made in Bronzed Iron finish ; alsoin Brass,…
