Bulgaria 1987 Winter Olympic Games set of 4 unmounted mint, SG 3475-78 (Mi 3617-20)
Bulgaria 1987 Winter Olympic Games set of 4 unmounted mint, SG 3475-78 (Mi 3617-20)
Bulgaria 1987 Winter Olympic Games set of 4 unmounted mint, SG 3475-78 (Mi 3617-20)