Serbia. Two Milan Obrenović Ciphers

Both is stamped metal/brass, one with stylized "MO" (Milan Obrenović), 34mm x 52mm, with two prongs on reverse; another, with stylized "M I" (Milan I), 29mm x54mm; both are ground recovered examples (or poorly stored); these types of insignia was used on high ranking Officer's Epaulettes, and also as cap badge for kepi, circa 1870-1890 period.