Vintage Lucite Telephone Timer

Functionality: This timer typically measures approximately three minutes, likely intended as a "long-distance call timer" in an era when such calls were charged by the minute.  Material: It's made of Lucite or acrylic, a clear plastic material popular in the mid-20th century for its durability and aesthetic appeal.  Era: These timers are commonly associated with the 1950s, 60s, and 70s, reflecting the design trends of the mid-century modern (MCM) era.