The Lucas is similar in appearance to the Sealyhams terriers of the 1920?s and 1930?s. Lucas Terriers have been in the USA since the late 1960's. This is a rare breed, with less than 100 inside the USA. The Lucas Terrier may be bred to either of it's parent breeds, the Sealyham Terrier or the Norfolk Terrier, and still be considered a purebred Lucas.
A sturdy, symmetrically built working terrier like the Sealyhams of old. There should be a combination of substance, power, balance and hard muscular condition. Any tendency to grossness or weediness is a serious fault. In balance with other proportions of the dog, and in keeping with its general conformation.