I have seldom seen these old specimens for sale, and then usually as simple thumbnails or larger sized reference specimens of little quality. This piece, however, has a valid old label from the great field collector Arthur Montgomery, who was known by his letters to have collected here himself in the early 1900s. This large, display-quality specimen, with crystals to 1 cm, is good on its own merits, worthy of any Arizona or wulfenite collection. I love the extra provenance as a bonus! Joe Budd Photos.