Claymo Probe Master of Moscow - Vichliaev Ivan - initials of I-B - 1802-1818.

The test master of Moscow - Vikhlyaev Ivan, had a stigma with the image of his initials and a year.In the upper part of the stigma, the initials are depicted by two letters of "and" and "B", there is a point between the letters, a separating line passes in the middle, the lower part "1804" is indicated at the lower part.(1802-1818) Form: rectangle