Vintage Case Tested XX Century of Progress Pen Knife – 1933–1934 Chicago World's Fair – Marshall Field & Company Tag

This extraordinary historical artifact is more than just a knife—it's a direct link to the golden age of American craftsmanship and a once-in-a-lifetime global event.

Crafted by Case during their revered "Tested XX" era (1920–1940), this commemorative pen knife was produced in honor of the Century of Progress International Exposition, held in Chicago from 1933 to 1934. Even more remarkably, it still bears the original Marshall Field & Company retail tag, confirming it was sold through one of the most iconic department stores in American history.

Founded in 1852, Marshall Field & Company was a Chicago retail institution, renowned for its luxury goods, impeccable customer service, and architectural grandeur. By the time of the 1933 World’s Fair, Field’s had become synonymous with style, refinement, and access to high-quality American-made products. A Marshall Field tag on a knife of this era is not just a point of sale—it’s a mark of premium provenance and cultural prestige.

Knife Details:

Maker: Case (CASE TESTED XX tang stamp)

Era: 1933–1934 (World’s Fair era)

Pattern: Pen knife (2-blade)

Blades: Mirror-polished carbon steel, spear & pen

Handle Material: Cream celluloid with blue inlay text

Inlay Text: "Century of Progress / 1933, Chicago 1934"

Extras: Original attached Marshall Field & Company tag (rare ephemera)

Closed Length: Approx. 3 1/4"

Country of Origin: USA

Condition Notes: Both blades remain unsharpened and clean, opening with excellent walk and talk. Mild scuffing in a few spots (see photos). Inlay text is crisp and fully intact. Handle scales are smooth with no cracks or warping. Factory pins and hardware are tight and original. The original Marshall Field & Co. tag is still attached by its string—a rare find in itself.

This knife has not been over-cleaned. It has been gently wiped and oiled to preserve its historic integrity.

Collector’s Note:
Knives like this are rarely seen outside of private collections. It represents a perfect intersection of pre-WWII Case history, World’s Fair memorabilia, and early 20th-century American retail heritage.

A superb centerpiece for any serious Case, historical, or Americana collection.

Ships securely via USPS Priority Mail with tracking and insurance.
Questions always welcome.