The listing, 1874 J.W. Mason Company-New York City Postcard has ended.
I am not positive but there might be a connection to J.W. Mason Company on this card and W. B. Mason, office suppliers. On the back is referenced an order for office chairs. Whatever the case, the building that originally housed J. W. Mason was torn down and a huge office complex erected in it's place at 375 Pearl Steet, New York City. The new complex went up in 1976 and underwent major renovations in 2016. This is on a 1 cent "Liberty" postcard. Mailed correctly and shipped free.