Mourning covers are seldom franked with commemorative stamps, but this registered three-color mourning cover is an exception.
Posted October 26, 1949, from Luxembourg-Gare, the franking includes the 2.50 F red and 4.00 F blue UPU 75th anniversary commemoratives that had been issued on October 6, 1949.
The 3.00 F concession 20g letter rate to France and the 4.00 F registry fee are paid with the addition of the 50c violet G.D. Charlotte [3rd. series] definitive.
The backstamps are the Luxembourg-Ville transit cds dated October 26 and the Paris arrival cds dated October 28, 1949.