Very rare Republic Sun Yat-sen brass Off-Metal “Two Reverses” 50 Cents Year 31 (1941 – 1943) PCGS UNC Details (Cleaned), Kann-866t brass, mint. Both sides showing obverse. Off-Metal brass and two reverses. By the way, PCGS labeled it 1942, however, there is no way PCGS knows for sure is 1942. It could be 1943 or even 1941. The rigorous way to label it is (1941 – 1943) like they did with some other coins. If you any questions, please let me know.