While trying to look for some Japanese light fixtures made in the Taisho era (between 1912 and 1926), I have stumbled upon this interesting looking preheat circline fluorescent pendant light fixture that happens to have some strange and unusual circline fluorescent lamps that possibly appear to be made in the 1950s when they were first introduced into the Japanese market.
I recommend that someone here tries to bid on this light fixture so that they can help save the lamps for their collections:
https://www.jauce.com/auction/v1127904092The lamps in this fixture are almost impossible to find nowadays.