vintage LISK Self-Basting Roaster 3pc set 1920s-1940s era inner pan lifts out

vintage LISK Self-Basting Roaster graniteware or speckleware  Self-Basting Lid: The LISK embossing on the top isn't just for branding; the ridges and indentations on the interior are designed to collect steam and drip it back onto the meat, keeping it moist without the cook needing to open the oven.  Adjustable Vent: The small round metal disc on the lid is a steam vent.  Condition Report has sticker residue  Surface Wear: There is significant chipping of the enamel along the edges and some scratching on the interior. Oxidation: In areas where the enamel has chipped away, the underlying steel is exposed and showing signs of rust. Functionality: The vent and handles appear intact, which is great for collectors. Mineral Deposits & Residue: You can see cloudy, white patches across the bottom of the deep pan and on the insert tray. These are typical lime deposits or hard water spots that build up over decades of roasting with water or steam. Hazy Surface: The shallow pan/tray shows a hazy or rainbow appearance on the black enamel, which indicates some surface wear from cleaning or acidic foods. Potential Rust: In the close-up of the lid interior, there is a small brownish-orange spot to the right of the LISK logo.   Inner Pan 16in x 10 3/4 in wide 1 3/4 in tall without handles Bottom 17 1/4 in wide without handles 19 in with handles 12 in wide 4 1/4 in tall Lid 17 in wide without handles 19 in with handles 11 1/2 in wide 4 in tall  STORAGE 7 1/4 in tall stacked