This one called out to me in a pile of "firm prices" pile at a card show in Marietta a few weeks ago. This tobacco card came from the Anstie Tobacco company in 1922 replacing my 1939 Playball Harold Schumacher as the oldest card in my collection.
This horse racing colours [notice the British spelling of "colour"...this was a British tobacco company after all.] set had 50 cards with the first 25 showing the different colours the riders wore and the last 25 featuring the jockeys themselves. Here's a collection of similar cards for sale on eBay currently.