A fine Modern pan by Corning in their Centura ware. This white body is somewhere between porcelain and glass and was a step before the Corelle body, made in the mid- to late 1960s.
This piece is in their Buffet Server line, a fine white Modern piece with a Black heat-proof (Bakelite) handle. It's a 10" skillet.
Size: 11.75" across the handles, 10.25" in diameter, 4.5" tall.
Condition: completely as new, no wear or damage. No interior wear or utensil marks. This is about as mint as you'll find.
Mark: Corning Buffet Server backstamp on the bottom.
Item ID: 4335