Vintage Navajo AL Augustine Largo Men’s Sterling Silver Onyx Ring Sz 10.5. This is a neat vintage Navajo signed AL Augustine Largo men’s Sterling Silver Onyx ring. Ring is in good to very good condition. The ring is a size 10.5. Marked Sterling and has AL Augustine Largo hallmark on the inside. Weighs 8.9 grams. Stone measures 14 mm x 10 mm or 8.48 cts. Stone tested as Onyx. View my photos for details. Please contact me if you have any questions.