Orange ring with a black three alpha-numeric code, starting number '6'.
note 1 : during 1994-97 have been used orange rings with black code - three letters/numbers, first number 6 (601 till 609, 60A, 60C, 60F, 60H, 60J, 60L, 60M, 60N, 60P, 60R, 60T, 60U, 60V, 60W, 60X, 611, etc...).
note 2 :