U.S. Mail City Delivery, Black Double Circle New York City Carrier Handstamp on Stampless Local Cover, "Held for Postage"

Cover addressed to Watertown, CT with “U.S. Mail/1/Nov/15/City Delivery” double-circle New York city carrier (unpaid) handstamp with “Held for Postage” on front, New York duplex datestamp on reverse. No 3c postage was paid, so the letter was held by post office.