Cards are from the Atlas editions motorcycle subscriptions set that came out in the early 90s. Only way to get these cards were through a subscription. It was not available in stores
Flying Merkel 1910 & 1914 Motorcycles card set
Cards might have some minor wear but is in good condition. On the back of each card it gives a bio and specifications of that motorcycle including engine size, speed, transmission type, hp, max speed and other info.