271. | Hird-Brown Limited. Catalogue | ||
272. | Relais type RSU (encastré) [Central Tejo] / Landis & GyrData: 06/10/1954 | ||
273. | Masskizze eines thermischen relaisblockes [Central Tejo] / Landis & GyrData: 12/11/1954 | ||
274. | Single pole over-current relay type S1 [Central Tejo] / Brown BoveriData: 28/05/1937 |