red circular datestamp with matching "25" rate handstamp on 1836 folded letter to Albany, New York, very fine, this is the earliest rate handstamp from Chicago and was only used for a brief period from August 1836 to March 1837, the next rate handstamps (the cog wheels) would not appear until mid-1845, letter contains information about dredging machinery from William H. Davis, illustrated in Piszkiewicz (page 5)