I picked up an album of Players cigarette cards in an album a couple of weeks ago for peanuts, and it's an interesting thing to look through.
There's no date on the album, "price one penny", but the era becomes apparent looking through the content.
The Lufthansa entries feature the "nasty logo" on the red band, plenty of flying boats, DH86s, and some great French items.
I don't suppose the information contained is reliable reference material, although it's all contemporary, but there is inspiration to be had just looking through.
Anybody else got interesting artefacts related to the Golden Age?