Underwood Portable 4 Bank Typewriter Value Guide

The Underwood Portable 4 Bank is a landmark in mechanical design, representing the company's first compact machine to feature a full standard keyboard layout. This specific model is highly sought after for its vibrant 'Duco' green marble lacquer finish, a luxury DuPont innovation that transformed functional office equipment into high-end Art Deco decorative pieces.

What affects the value of Underwood Portable 4 Bank Typewriter?

• The condition and vibrancy of the rare green marble lacquer finish, as Duco finishes are prone to chipping or fading over time.
• Mechanical functionality, specifically the responsiveness of the four-bank carriage and the integrity of the original rubber platen.
• The presence of the original carrying case, which protected the machine's aesthetic value and portability.
• Rarity of the color variant, with marbled patterns commanding a premium over standard black or solid-colored enamel models.

How to Identify Underwood Portable 4 Bank Typewriter?

• Verify the presence of the four-bank keyboard layout, which lacks the shift-key compromises of earlier 3-bank portable models.
• Look for the distinct 'Duco' lacquer finish, characterized by a marbled green pattern rather than a solid painted surface.
• Check the serial number located on the frame to confirm a production date between 1928 and 1930.
• Inspect the key tops for original glass inserts over white or cream-colored legends, typical of high-end Underwood portables from this era.

History of Underwood Portable 4 Bank Typewriter

Introduced in 1926, the Underwood Portable 4 Bank was the company's answer to the demand for a compact machine that didn't compromise on the standard keyboard layout. This specific example features the 'Duco' finish, a lacquer developed by DuPont that allowed for vibrant colors and marbled patterns, making it a high-end decorative piece during the late 1920s.