Old black & white photos and how they show the colours

Sintra yellow tram
Sintra yellow tram no.7 with simulated orthochromatic BW (left) and panchromatic BW (right) versions of the original colour photo.

Because we are used to panchromatic black & white these days, not everyone realises that old photos are often of a different kind of black & white. E.g. a tram on an old photo looking dark, could have been yellow.

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