This authentic large rectangle brass porthole has a total weight of 66 pounds. The outside frame measures 20 1/4 by 28 1/4 inches. The original glass measures 15 3/4 by 23 1/2 inches. The flange on the back side of this porthole measures 16 7/8 by 25 1/2 inches, and it extends out from the frame by just under one inch.
The original glass is free of any cracks but does have minor surface wear and minor scratches. This porthole was polished, but I would not consider it a fresh polish job. The paint has been removed, but the brass surfaces have taken on a weathered look.
The closure dogs on this porthole have a very unique design. The closures operate from the back side of the window. With this design you can have the look of the brass porthole on the outside wall, and have the opening and closure dogs on the inside. It truly is a very rare design.
The word “porthole” has nothing to with its location on the port side of a ship, but originated thanks to Henry VII of England in 1485. The king demanded on mounting guns that were too large for his ships and French shipbuilder, James Baker was brought on to solve the problem. He pierced the ship’s side so that the cannon can could be mounted inside. When there was heavy weather or the cannons were not in use, the openings in the ships were fitted with covers that latched tightly. These were called porte, which means door in French. Porte became port thanks to the English and eventually any opening on a ship was called a porthole.