4 Vintage Federal Glass Company White Heat Proof D Handle Cups / Mugs

4 Vintage Federal Glass Company White Heat Proof D Handle Coffee / Tea Cup Mugs Measurement: 3.5" tall x 3.25" wide. Made in USA Circa 1950-1960 Show the Federal Glass trademark of an F in a shield underneath cup. Excellent vintage condition. No chips, cracks, or breaks on 3 of the cups. One has two marks / small chip on glaze. Please review pictures. These mugs are clean and well cared for.