The lamps are still made by GE, but the new bases are made by Tungsram, GE's Hungarian division. The mercury lamps are also made by Tungsram. Even the high wattage mogul incandescents made by GE (now in Mexico) got the new bases. Hope this helps!
That's what I thought. I ordered a 400 watt MV lamp for my collection, so I'll see how well it performs.