That 209 Pearl Street address has had an interesting history:
1793: Glendining & McClaren, Importers of Irish Goods
1798: Glendining & Adams, ditto
1812 - 1826: Glendining and Buckley, ditto
1827: sold by Glendining (retired, after outliving all his business partners!) to William Redmond
1829: occupied by William Buck, who won a diploma for inventing a cheese press!
1831 - 1833: Doremus, Suydam & Nixon, Irish & Scotch Linen dealers
1836 - 1841 (?): J & C Gascoigne - Hardware Importers & Dealers
1856: occupied by a druggist, a shipping clerk, a laundress and a printer
1879: cigar shop
The gaps between 1833 and 1836, and 1841 - 1856 would be interesting to know to narrow down J & Cs occupancy a bit. The 1836 City Corporation index that lists them as 'Hardware Importers & Dealers' backs up Martins findings and also shows that the razor was most likely made in the UK and stamped up with their names and New York.
Regards,
Neil