American Locomotive Company (Alco) DL-109 #0712 of the New York New Haven & Hartford circa 1947.
This 10oz tumbler is dishwasher safe and made of durable stainless steel. Double-wall, air-gap construction means it will maintain the temperature of its contents for much longer than a regular tumbler.
Dimensions
Capacity = 10 ounces
Height = 4 5/8 inches
Diameter = 3 3/8 inches