Hi Chris,
The lead wires are probably nickel plated dumet which is why it looks like platinum. NPD is used for almost all modern miniature bulbs made on high speed machines because it withstands the higher manufacturing temperatures better than regular dumet wire. Flashlight bulbs nearly always use this wire.
In the UK there is a very similar bulb known as GPO2 (General Post Office Type 2) and the carbon filament variants of this were still being mass produced up to the early 1980's. They were killed off though with the advent of digital switchboards, however a limited range of tungsten filament equivalents is still in production today.
Hope this helps,
James.