Registered/Sep. 13, 1904/Exposition Station/St. Louis, Mo. Violet four line Expo. handstamp (Bomar STL04-08B) on cover to Germany franked with complete set of 1904 1¢-10¢ Louisiana Purchase tied by St. Louis oval cancels, 3¢ with trivial toned spot & 5¢ with minor pulled perf, Very Fine, only 5 covers are recorded with a complete set of Louisiana Purchase and this rare registry marking. Estimate  $750 - 1,000. $0 (Image)