Challenge of the McKennas

Challenge of the McKennas (Italian: La sfida dei MacKenna; Spanish: Un dólar y una tumba, also released as One Dollar and a Tomb) is a 1970 Spaghetti Western made as a Spanish-Italian co-production. Argentine-born director León Klimovsky helmed the picture from a screenplay by Pedro Gil Paradela and Edoardo Mulargia, with a score by Francesco De Masi and production by José Frade.

The cast is led by Canadian actor John Ireland alongside Robert Woods, Roberto Camardiel and Annabella Incontrera, with Giovanni Cianfriglia and Daniela Giordano also appearing. The film premiered in Spain on 25 April 1970. A German release was announced under a different title but never took place.