talkmagic.co.uk

I don't know if this has been posted before (a search found nothing), but here is a archive of old engineering playing cards hosted by the New York Public Library: NYPL Website

These cards are from 1702, from the William Barclay Parsons collection.

Just stunning, especially since these are hand made (9x6cm in size).

-James Physit

It should be noted that the NYPL has over 400 seperate images of old playing card sets online:
NYPL Playing Cards