Moscow City Clay 1677-1678 "The two-headed eagle with the letters RP and S"

The earliest Moscow brands are a double -headed eagle of various sketches, in shields of various shapes, sometimes with a date, expressed at first by Slavic letters, later Arabic numerals.To the left of the eagle, the letters "RP" are depicted, the letter "S" is depicted to the right.(1677-1678) Form: circle