Some of these I recognise from a late 60's Philips Australia catalog. The nice thing was they all had BC sockets. In fact until the early 1980's most shops here did not even stock ES light bulbs; you really had to go to an electrical supplier or a very good hardware store to get them...they were not seen in supermarkets or the corner store. ES sockets for GLS lamps should never have been promoted for 240V domestic use. I'm surprised the political correct nanny state has allowed such a wide scale importation of such light fittings given their safety hazards but yet insist on sleeved plug pins that bend because the brass is now thinner.