Luxembourg 1.5.1940 PCGS Graded 50 Frang (Face and Back Photographic Proof)
Luxembourg 1.5.1940 PCGS Choice About UNC 58 50 Frang (Face Photographic Proof)
Luxembourg 1.5.1940 PCGS Very Choice UNC 64 50 Frang (Back Photographic Proof)
Similar to Pick-46 in design, but dated 1940, making these historically important proofs. It appears that the design was ready but that they were not issued due to the German invasion. At the end of the War, this type was finally issued, but without a date. Presumably unique and quite important. PCGS mentions "Minor adhesive residue, small edge tear at UL, mounted on cardstock".