Black and Red Double OB on Deep Violet and Violet 
6c, 8c and 12c THE LARGEST RECORDED MULTIPLES

1913 AUGUST 4: MANILA to CONSTANTINE, MICHIGAN
4c Carmine on amber size 9 Constabulary postal envelope uprated with 1911 12c Lincoln
with black OB for proper 16c Double Outbound Rate.
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Red Overprint