This is an Aikin Lambert Vis-O-Pen Gray lever fill fountain pen, model 238 c. 1937. The name comes from the "Ink Gauge" clear window in the section, which shows the remaining ink level. At the time Aikin Lambert was part of the Waterman company and Aikin Lambert Skywriter and Vis-O-Pen models were budget priced and marketed as "Made By Waterman's." It came in Black and three lustrous "pearl" colors: Dubonnet (a burgundy), Green, and Gray. The trim is polished "blue-white chromium." This 4 7/8 inch long pen has VIS-O-PEN over AIKIN LAMBERT CO. over NEW YORK, N.Y. U.S.A. imprinted on the barrel opposite the lever. The gold plated stainless steel nib is stamped VIS-O-PEN over IRIDIUM over POINT over U.S.A over 38 (the model number). The pen sold for $1.00, with matching twist-action pencils selling for 50 cents. This pen is available on eBay: https://www.ebay.com/itm/225011316108 #pencollecting #fountainpen #aikinlambert #waterman #watermans #visopen #skywriter #celluloid #penhero https://www.instagram.com/p/CePQMnzP3gJ/?igshid=NGJjMDIxMWI=