Officer # 12 is Romanian. He wears the uniform of the Royal Palace Guard Regiment. The insignia on his hat is that of King Michael which dates this photo to 1940. The hat insignia for officers of this regiment normally has the royal crown in the center of the wreath. Some officers from this regiment where also assigned to the King as ADC - Aide de Camp, or Personal Adjutant to the King. In this case, the crown was replace with the Royal cypher of the King. This officer is ADC to King Michael and member of the Royal Palace Guard Regiment. Rank is Colonel.