ESL vintage opera glasses

ESL Bakerlite vintage opera glasses. Art Deco 1930s - 1940s. 
 
This pair of vintage opera glasses are made of Bakelite, a type of early plastic, and featuring an Art Deco design from the 1930s to 1940s. Bakelite was a popular material for various items, including opera glasses, during this era due to its durability and ability to be molded into intricate designs.
Here are some key points about these ESL Bakelite vintage opera glasses with an Art Deco design:
Material - Bakelite:
Bakelite is a type of synthetic plastic that was widely used in the early 20th century. It was appreciated for its heat resistance, electrical nonconductivity, and ability to take on various colors and finishes.
Design - Art Deco:
Art Deco was an influential design style that emerged in the 1920s and flourished in the 1930s and 1940s. It is characterized by geometric shapes, sleek lines and stylized motifs. 
Dating - 1930s to 1940s:
The Art Deco design and the use of Bakelite suggests a dating range in the 1930s to 1940s. These decades marked the height of the Art Deco movement.
Collectibility:
Vintage opera glasses made of Bakelite, especially those with an Art Deco design, can be collectible items. Collectors often appreciate the combination of historical significance, material, and design aesthetics.