Art Nouveau Unger Bothers Sterling Silver Peacock Woman Letter Opener. This is a beautiful and rare sterling silver letter opener made by Unger Bros an important American Art Nouveau sterling silver maker. The woman is finely detailed in high relief with flowing hair and a peacock. The bottom of the letter opener is slightly worn otherwise it is in excellent condition. Letter opener measures 7 5/8" long by 2 5/8" wide. Weight 43.6 grams.