Antique extra bell for L.M. Ericsson telephone model RA 10/2 RA 10/2000 ^Sale

RING BELLS for alternating current, Telefon AB LM Ericsson, model RA 10/2-RA 10/2000, seen in the 1930 catalogue, 2 bells in nickel-plated brass, back piece in oak, lithographed iron plate with decor imitating oak. 1000 ohm. Made ca 1930 by L.M. Ericsson & Co, Stockholm. 
Size app.: 17.5 cm (roughly 6.9 in) high, 14 cm (roughly 5.5 in) wide, 8.3 cm (roughly 3.3 in) deep. Very good condition, age n usage wear, minimal losses to finish of case. Please study good resolution images for cosmetic condition. In person actual painting may appear darker or brighter than in our pictures, strictly depending on sufficient light in your environment. Weight of app. 1 kg is going to measure 2 kg packed for shipment.
Founded in 1876 by Lars Magnus Ericsson in Sweden, L.M. Ericsson & Co. initially focused on manufacturing telegraph equipment before shifting its focus to telephones. By the early 20th century, the company was known for its innovative designs and reliable technology. Ericsson played a significant role in the development of telecommunications infrastructure, including switches and exchanges, which were crucial for the expansion of telephone networks.