This insulator disk for the high voltage carrying electrical cables was manufactured in 1964 and used by the SEC Vic (Kiewa Hydro Electricity Scheme) from that date until late 1900's. It was used to connect high voltage cables to their "towers" going from various Hydro Generators to and from power "stations". During this time period, high quality "cable" insulators were manufactured in Japan. In an earlier time they would have been sourced from Europe or England. After the 1950's the sourcing of electrical hardware was being influenced by the lower costs obtainable from Japan. Later on other Asian sources also became available.The need for a mountainous and a large area of operational requirements, such as the SEC Vic Kiewa Hydro Electricity Scheme, to distribute the electricity produced in the Victorian Alps to the major users required power transmission lines to "carry" high above the sometimes inaccessible land mass electricity generated at the power stations to the various sub stations along the valleys and ranges to flatter populated regions. The significance of this insulation "high voltage" disk to the Kiewa Valley region relates to the impact of modern technology (at that time) upon a mainly rural environment. These power lines are a stark visual "show" of the impact that the "Scheme" has on the mostly rural landscape of the Kiewa Valley and what a boost of "modern" equipment into the area has taken place. The "Hydro Scheme" had facilitated the transition of a semi rural area to an advanced rural region within a shorter time frame, than would have taken under "normal" evolutionary time. The speed of information of all "new technology" had a relatively slow assimilation rate before the SEC Kiewa Hydro Scheme came to those living in the then quieter rural communities. This high voltage (330 KV) insulation disk is made from non conductive porcelain stoneware. It is highly polished brown in colour and has a clip fastening for the high voltage cable to be attached to. This disk was hit by lightning and the burn marks are quite noticeable. The top metal connector has a "mushroom" extension jutting below the semi cone like insulation disk. Also four circular ridges or grooves (old 78 rpm disc recording style).Cable bell on top of insulation disk "4K " next to it the international symbol for electricity (triangle containing one horizontal line under one V line and one vertical flame like line.) On the opposite side "2" and to the right "64"sec vic kiewa hydro scheme, alternate energy supplies, alpine (above ground) high voltage electricity cables, volt cable, 330000 volt cable