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Short desc: multiple airplanes
Description: Users of this watermark: Luxembourg (2 stamps, 1928) Used by 2 stamps of Luxembourg: (See all uses as list) 2fr unissued official 10/16/1928 2fr oc=blk on=2fr-blk-view of Clervaux-wmk=multiple airplanes All are blk d=view of Clervaux perf=11.5 |