This is a nice looking and clean condition vintage Stirling Cycle Engine toy model that operates on heat (denatured alcohol is recommended but will run on anything that burns)..its all original with cast iron base,original painted surface,burner etc..its from the late 1970s and comes with a 120 page book and instructions that tells all about its history and how it operates..very nice displayable condition with no wear-appears to have never been used -didnt try it so cant say how it runs..its 7 1/2 x 4 and is mounted on a laminated type base ....looks and displays well and is guaranteed original and authentic .......Shipping is via USPS in US and overseas…...always glad to combine on multiple buys when possible