They are made of a brass-like material and each is stamped with SWISS MADE, FAB SUISSE and the part number (0292, 0149, 0512). The plates are approximately 4.5-4.8 cm wide and 2.7-3.2 cm high. We do not know the age or details. Please contact me if you have any questions.International Buyers - Please Note. This item is in the category "Jewelry & Watches\Watches, Parts & Accessories\Watch Accessories\Boxes & Cases". The seller is "hallelujah-japan" and is located in this country: JP. This item can be shipped worldwide.