Our attribution of this piece is made based on other pieces that we have seen with very strong attributions and the pieces are extremely close. http://www.brownstrading.com/JUAN-DE-DIOS-CAST-BUCKLE-p/c1dg.htm is a great example.
JUAN DE DIOS (or DIDEOS or DIDEDIOS or DELEOSA (Zuni, c. 1882-1944). In John Adair's study of Navajo and Pueblo silversmiths in 1944, he identified Juan Dedios as one of the finest Zuni artisans. He was known for his outstanding and precise silver castings and although this piece is not signed he was one of the first Native American artists to sign his pieces. Dedios was one of the first producers of Knife Wing figures and was well known for his cast crosses, conchas, bow-guards, bracelets and exquisitely detailed crucifixes. Dedios worked closely with trader C. G. Wallace, who retained many of his pieces for his private collection.