• Subscribe Now
  • Today In History
  • Wars & Events
    • The Russia–Ukraine War
    • American Revolution
    • The Civil War
    • World War I
    • World War II
    • Cold War
    • Korean War
    • Vietnam War
    • Global War on Terror
    • Movements
      • Women’s Rights
      • Civil Rights
      • Abolition of Slavery
  • Famous People
    • U.S. Presidents
    • World Leaders
    • Military Leaders
    • Outlaws & Lawmen
    • Activists
    • Artists & Writers
    • Celebrities
    • Scientists
    • Philosophers
  • Eras
    • Modern Era
      • 2000s
      • 1900s
      • 1800s
    • Early Modern
      • 1700s
      • 1600s
      • 1500s
    • The Middle Ages
    • Classical Era
    • Prehistory
  • Topics
    • Black History
    • Slavery
    • Women’s History
    • Prisoners of War
    • Firsthand Accounts
    • Technology & Weaponry
    • Aviation & Spaceflight
    • Naval & Maritime
    • Politics
    • Military History
    • Art & Literature
    • News
    • Entertainment & Culture
    • Historical Figures
    • Photography
    • Wild West
    • Social History
    • Native American History
  • Magazines
    • American History
    • America’s Civil War
    • Aviation History
    • Civil War Times
    • Military History
    • Military History Quarterly
    • Vietnam
    • Wild West
    • World War II
  • Newsletters
  • Podcasts
  • Privacy Policy
  • Terms of Service
  • Facebook
  • Twitter
  • Instagram
  • YouTube
Skip to content
  • Privacy Policy
  • Terms of Service
  • Facebook
  • Twitter
  • Instagram
  • YouTube
HistoryNet

HistoryNet

The most comprehensive and authoritative history site on the Internet.

  • Subscribe Now
  • Today In History
  • Wars & Events
    • The Russia–Ukraine War
    • American Revolution
    • The Civil War
    • World War I
    • World War II
    • Cold War
    • Korean War
    • Vietnam War
    • Global War on Terror
    • Movements
      • Women’s Rights
      • Civil Rights
      • Abolition of Slavery
  • Famous People
    • U.S. Presidents
    • World Leaders
    • Military Leaders
    • Outlaws & Lawmen
    • Activists
    • Artists & Writers
    • Celebrities
    • Scientists
    • Philosophers
  • Eras
    • Modern Era
      • 2000s
      • 1900s
      • 1800s
    • Early Modern
      • 1700s
      • 1600s
      • 1500s
    • The Middle Ages
    • Classical Era
    • Prehistory
  • Topics
    • Black History
    • Slavery
    • Women’s History
    • Prisoners of War
    • Firsthand Accounts
    • Technology & Weaponry
    • Aviation & Spaceflight
    • Naval & Maritime
    • Politics
    • Military History
    • Art & Literature
    • News
    • Entertainment & Culture
    • Historical Figures
    • Photography
    • Wild West
    • Social History
    • Native American History
  • Magazines
    • American History
    • America’s Civil War
    • Aviation History
    • Civil War Times
    • Military History
    • Military History Quarterly
    • Vietnam
    • Wild West
    • World War II
  • Newsletters
  • Podcasts
Posted inAsk Prof. History, Weapons & Gear Manual

What was the purpose of a black sphere on a dogtag chain?

by Gerald Swick6/9/20154/13/2016
Share This Article

Dear Mr. History,

My dad served in the Air Force from 1947 to 1969. He has since passed, and I have his dog tags. Along with the tags is this black round sphere that unscrews. Can you please till me what it was used for on the dogtag chain?

—CSC

? ? ?

Dear CSC,

I can’t be sure from your description what that “black sphere” was or its purpose, but I can state that it was nothing official. The regulation item on an identification tag chain was identification tags; anything else was accessorizing. Two former U.S. Air Force acquaintances mentioned their add-ons, one being a P-38 can opener. The other said:

“I also had a GI can opener on mine, plus some Buddhist images. They were a big help in Southeast Asia; you could land at a Royal Thai Air Force Base, the ground crew would spot the Buddhas. We’d compare necklaces, and sometimes trade one Buddha symbol for another. Always guaranteed great service!”

As a light infantryman in the Army National Guard, I tended to limit what I carried on my ID tag chain to ID tags, with steps taken to keep them from making noise in the field.

Sincerely,

 

Jon Guttman
Research Director
World History Group
More Questions at Ask Mr. History

 

Don’t miss the next Ask Mr. History question! To receive notification whenever any new item is published on HistoryNet, just scroll down the column on the right and sign up for our RSS feed.

Share This Article
by Gerald Swick

more by Gerald Swick

Dive deeper

  • Army Air Forces
  • Artifacts
  • Profile
  • veterans

Citation information

Gerald Swick (2/18/2026) What was the purpose of a black sphere on a dogtag chain?. HistoryNet Retrieved from https://www.historynet.com/what-was-the-purpose-of-a-black-sphere-on-a-dogtag-chain/.
"What was the purpose of a black sphere on a dogtag chain?."Gerald Swick - 2/18/2026, https://www.historynet.com/what-was-the-purpose-of-a-black-sphere-on-a-dogtag-chain/
Gerald Swick 6/9/2015 What was the purpose of a black sphere on a dogtag chain?., viewed 2/18/2026,<https://www.historynet.com/what-was-the-purpose-of-a-black-sphere-on-a-dogtag-chain/>
Gerald Swick - What was the purpose of a black sphere on a dogtag chain?. [Internet]. [Accessed 2/18/2026]. Available from: https://www.historynet.com/what-was-the-purpose-of-a-black-sphere-on-a-dogtag-chain/
Gerald Swick. "What was the purpose of a black sphere on a dogtag chain?." Gerald Swick - Accessed 2/18/2026. https://www.historynet.com/what-was-the-purpose-of-a-black-sphere-on-a-dogtag-chain/
"What was the purpose of a black sphere on a dogtag chain?." Gerald Swick [Online]. Available: https://www.historynet.com/what-was-the-purpose-of-a-black-sphere-on-a-dogtag-chain/. [Accessed: 2/18/2026]

Related stories

Buffalo Bill Cody
Stories

10 Pivotal Events in the Life of Buffalo Bill

William Frederick Cody (1846-1917) led a signal life, from his youthful exploits with the Pony Express and in service as a U.S. Army scout to his globetrotting days as a showman and international icon Buffalo Bill.

ww2-homefront-poster-war-bond
Portfolio

During the War Years, Posters From the American Homefront Told You What to Do — And What Not to Do

If you needed some motivation during the war years, there was probably a poster for that.

Booger Red Privett on horseback
Feature

The One and Only ‘Booger’ Was Among History’s Best Rodeo Performers

Texan Sam Privett, the colorfully nicknamed proprietor of Booger Red’s Wild West, backed up his boast he could ride anything on four legs.

Stories

The Top Books and Films About Buffalo Bill Cody

Steve Friesen, the former director of the Buffalo Bill Museum & Grave in Colorado, assesses what has been written and filmed.

HistoryNet
  • Facebook
  • Twitter
  • Instagram
  • YouTube

“History is a guide to navigation in perilous times. History is who we are and why we are the way we are.”

David McCullough, author of “1776”

HistoryNet.com is brought to you by HistoryNet LLC, the world’s largest publisher of history magazines. HistoryNet.com contains daily features, photo galleries and over 25,000 articles originally published in our nine magazines.

Our Magazines

  • American History
  • America’s Civil War
  • Aviation History
  • Civil War Times
  • Military History
  • Military History Quarterly
  • Vietnam
  • Wild West
  • World War II

About Us

  • What Is HistoryNet.com?
  • Advertise With Us
  • Careers
  • Meet Our Staff!

Stay Curious

Subscribe to receive our weekly newsletter with top stories from master historians.

sign me up!

© 2026 HistoryNet.
  • Privacy Policy
  • Terms of Service