For sale is this great, SIGNED Mikimoto Sterling Silver & Pearls Pin. Because of the thickness of the sterling silver and the larger 6.5mm size of the cultured Akoya pearls, I believe it is pre WWII. Also, contrary to what some may believe ALL Mikimoto pins are signed and none of the markings were covered or removed. After the second world war when the Allied forces occupied Japan, they feared an illegal pearl trade. So, pearls sales were discouraged within Japan. Instead, the Japanese sold pearls in military stores frequented by Allied troops. Many other companies copied Mikimoto's style and they are of excellent quality, but if they do not carry the Mikimoto hallmark (M inside a clam shell), they are not Mikimoto. The brooch weighs a hefty 8.8 grams and is in perfect condition.