Here’s a small oblong brass Perko porthole that is cast brass and weighs just 13 1/2 pounds. The outside of the frame measures 14 3/4 by 7 5/8 inches and has 10 mounting holes. The glass measures 12 by 5 inches. On the back, the raised flange measures about 12 3/8 x 5 3/8 inches by 2 inches deep. Removed from a Chris Craft boat being cut up for scrap.
The two wing-nut dogs work and the window opens freely; this porthole includes the original screen with no holes, just some bending, and the original glass has minor surface scratches. All the paint on this porthole is completely original. On the front of the frame, there is a stamp from the manufacturer, PERKO.
Perko Inc. is a privately owned, fourth generation family corporation. Originally founded as F. Persky & Co. in 1907, the original product line consisted of hand formed and soldered navigation lights, ventilators and chart cases fabricated from brass, copper and galvanized steel.
Chris Craft is an American manufacturer of luxury boats, building boats in a range of sizes since 1874. Known for their classic beauty, stunning woodwork and agile handling.
The original rubber seal between the window and the main frame is still in place, but may not provide a complete weather tight seal due to age and minor unevenness between the two surfaces.
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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.