Spacious Classic 6 – Available for the First Time in Nearly 60 Years - Shown by Appointment Only Welcome to Apartment 3H at 173–175 Riverside Drive — a rarely available, grand-scale 3-bedroom, 2-bath Classic 6 in one of the Upper West Side’s most admired prewar co-ops. This timeless residence combines the scale, charm, and flexibility so highly sought after by today’s buyer, and sits on the north...