Lot 649
1875, 20 c. grey-brown and 25 c. blue, tied by cds. "LUXEMBOURG 8/2 76" to large part of cover to Montreal, Canada, showing on reverse London transit mark; on reverse red wax seal "CONGRES INTERNATIONAL DES AMERCANISTES", the stamps with small transportation faults; an extremely rare item with legitimately used service stamps of the first issue; sign. Goebel in pencil
Provenance: Isaac Seligson (1982)
