A 1 1/2 quart deep blue divided serving dish with clear glass lid from Pyrex.  The dish measures 12 3/4" long, 8 1/2" wide, and 2" high.  The lid is impressed with "Pyrex" and the number "945 C 36."  The bottom of the dish is impressed with "1 1/2 Quart Pyrex Made in USA"  The glass lid has some surface scratches from handling and use.  The divided serving bottom is nearly pristine, with no chips, cracks, or stains. 

Corning Glass Works and Pyrex

From Wikipedia:  Pyrex was created in 1915 when chemists at Corning Glass Works invented a new kind of borosilicate glass that could withstand extreme temperature fluctuations.  Soon after, popular over-to-table-to-refrigerator household kitchenware was introduced.  The continued popularity of Pyrex over the years saw the creation of nested and Cinderella mixing bowls, casseroles, divided servers, refrigerator sets, carafes, and dinnerware (to name a few) in bright colors and lively patterns.