Various old blackout/nightlight lamps

Over the past few years I have amassed a fair amount of these, and it seems there is no end to the number of variations out there, although I am very close to completing them all as far as I know. The black Osram example on the right is rarer than the later (nightlight) lamps, such as the one on the left, that commonly came in pink, green and yellow as it is a proper blackout lamp (this design was later re-adapted and saw popularity as a nightlight lamp.)