13.930 g. 4 ducat (13, 93 g), 1931, Alexander I., Belgrad, Aversum: staggered length portraits of the royal couple left, reverse: crowned double eagle with breast shield, beneath indication of value, Fried. 4 Schlum. 2.1 nice 12 Mandic 12. 1a K. M. 14, reeded edge, with purity warranty stamp "spike" for Serbia on the front by 16 clock, finest superficial fine scratches, plate.