Yields information about how the SEC filed pamphlets or information papers about tramway overhead and associated equipment and letters.Green cardboard file folder with metal clip and binder - "The Acorn Individual File - Foolscap size with title blocks containing the following items: 4910 - Tangential Suspension - overhead 4911.1 - Letter from "The Forest City Electric Co. Limited" to ESCo re Point controllers, tramway signals and warning signs, dated 29/7/1936 - 2 pages 4911.2 - Collins Patent Automatic Point Turner - sheet 19 - 4 pages - sheet 19, two copies 4911.2a - ditto, sheet 18 QT - four pages 4911.3 - Electrically operated Point switches, overhead frogs and signals for tramcar depots. - four pages 4911.4 - Automatic Tramway Signals - five pages - sheet ATS1 4911.5 - Universal Insulator - Sheet 17 - 2 pages 4911.6 - Porcelain hangers - sheet 15/1 - 2 pages 4911.7 - Porcelain insulators for cap and cone supension - page 11, 1 page. 4911.8 - Motor Bus and Tramcar Stage and Fare Signs in Cast Aluminium - sheet MD2 - 1 page 4911.9 - Flashers and Spellers - Sheet F1 - 2 pages 4911.10 - Forest City Relays - 2 pages 4911.11 - Traffic light - 1 page, sheet 2A 4912 - Memo re Suitability of Mr A. Widdop as a linesman - 18/11/1936 4913.1 - Letter dated 22/6/1937 from Agent General in London to the SEC Melbourne regarding shipment of the Non-Car Counting Signals. 4913.2 - Letter from the Forest City Electric Co 18/6/1937, regarding forwarding a blue print for the signals. 4914 - Letter from the Forest City Electric Co 23/6/1937, regarding forwarding sample insulators and booklet 15.2 4915 - Letter from Sands Hill Manufacturing Co to ESCo re regarding overhead crossings - dated 13/4/1928. 4916 - Memo dated 14/3/1934 to Mr Pringle, regarding tension in trolley wire. 4917 - Letter from T. Strickland MMTB to Bendigo re standard height for ears above rail level - 16/3/1934. Some of these document Scanned in pdf form to COTMA Library 1/2011 On rear of file: Top of file - "Tramways", in title block "Tramway Overhead & Signals" and in bottom right hand corner - "230". On spine - in pencil - "Overhead Parts and Proceedings"trams, tramways, signals, overhead, pamphlets, manual