The Downsizing Doula

28” diameter, very heavy. A Rostand porthole refers to an antique, highly collectible maritime ship window manufactured by the Rostand Manufacturing Company, which was based in Milford, Connecticut. Operating during the late 19th and mid-20th centuries, the company became a prominent supplier of heavy-duty marine hardware. Their portholes were heavily used on commercial vessels, yachts, and U.S. Merchant Marine ships during WWII.