细节
An electrically-operated spring-drive Signal Bell,
Cat. Ref. 13067, housed in hut with corrugated roof, circa 1932 (G-E) and a Bell Switch Cat. Ref. 13720P
Cat. Ref. 13067, housed in hut with corrugated roof, circa 1932 (G-E) and a Bell Switch Cat. Ref. 13720P