Sounders and Relays and Galvanometers.
229..... An early American sounder made by MESCO. The frame is made of cast metal and most of the parts are brass. On the arm is stamped MESCO inside an oval.
230..... The grandest sounder around! The British GPO sounder. This one is in superb condition. pre 1880's. It has 900 stamped on the base, that stands for the 900 Ohms resistance of the coils (thanks Ron McMullen), and "GPO 21014" on the brass work.
231..... American sounder made by Western Electric. The black base appears to be made of wood, and has "SOUNDER 3B 20 OHMS" printed on the side. On the arm is printed "WESTERN ELECTRIC MADE IN USA".
232..... British sounder from A. W. Gamage Ltd. London, England. Also stamped on the wooden base is "20 OHMS".