Circa 1950s Hammer Brand USA Pen Knife – Swirl Celluloid Handle with Key Ring

This charming vintage pen knife was manufactured under the Hammer Brand name, a well-known line of pocket knives produced by the Imperial Knife Company. Made in the USA, it features vibrant swirl celluloid handles with copper, brown, and green tones—giving it a standout mid-century aesthetic. The knife includes a single pen blade, nickel silver bolsters, and a built-in keyring for easy everyday carry.

Tang is stamped:
HAMMER BRAND / USA

Features:

Maker: Hammer Brand (Imperial Knife Co.)

Origin: USA

Production Era: Circa 1950s

Blades: 1 (Pen Blade)

Handle: Swirl Celluloid with Nickel Silver Bolsters

Extras: Built-in Keyring

Closed Length: Approx. 3 1/4"

Condition: See detailed notes below

Condition Notes:
In good vintage condition. Blade opens smoothly with moderate snap, showing light patina and handling wear. Handle covers are vivid and secure with no cracks. Bolsters show minor age-appropriate wear. A lively and functional example of a classic mid-century American pocketknife.

History Note:
Hammer Brand knives were produced by Imperial Knife Co. and were especially popular from the early 1900s through the mid-20th century. They were known for being dependable, affordable working knives with stylish handles often made of celluloid. Many, like this one, were carried as utility or giveaway items and retain strong appeal among collectors of American-made vintage cutlery.

Collector’s Note:
This is a great example of mid-century American pocketknife design—lightweight, colorful, and built to last. With its bright handle and Hammer Brand roots, it’s perfect for collectors of Imperial knives, EDC enthusiasts, or anyone with an eye for vintage Americana.

Disclaimer:
All knives in this shop are vintage or pre-owned unless stated otherwise. While many are in excellent condition, they may show normal signs of age or handling such as scuffs, blemishes, or blade wear. I try to document condition as accurately as possible in both the description and photos. By purchasing a knife from this shop, you confirm that you are at least 18 years of age. Feel free to reach out with any questions!