Summary

DescriptionMarx brothers Tonight Show.jpg	English: Photo of all 5 Marx brothers from an appearance they made on the Tonight! show. From left-Harpo, Zeppo, Chico, Groucho and Gummo.
Date	This photo was originally taken and published by NBC prior to the 1961 death of Chico Marx, as all five brothers appeared as guests on the program. It was taken by an NBC press employee--appears to have been taken in one of the "green rooms" at Rockefeller Center. However, the earliest date stamp is May 18, 1970.
Source	eBay front back
Author	NBC Television-photo by Ethel Kirsner, NBC Press
Permission (Reusing this file)	Pre-1978, no mark
Other versions	This file has an extracted image: Gummo Marx, Tonight Show.jpg.

Just prior to their only television appearance together on the "Tonightǃ America After Dark" show, hosted by Jack Lescoulie, February 18, 1957. reddit

• The photo has no copyright marks on it as can be seen at links and original upload.
• United States Copyright Office page 2 "Visually Perceptible Copies The notice for visually perceptible copies should contain all three elements described below. They should appear together or in close proximity on the copies.

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Licensing

This work is in the public domain in the United States because it was published in the United States between 1929 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties. العربية ∙ беларуская (тарашкевіца) ∙ čeština ∙ Deutsch ∙ Ελληνικά ∙ English ∙ español ∙ français ∙ Bahasa Indonesia ∙ italiano ∙ 日本語 ∙ 한국어 ∙ македонски ∙ Nederlands ∙ português ∙ русский ∙ sicilianu ∙ slovenščina ∙ ไทย ∙ Tiếng Việt ∙ 中文（简体） ∙ 中文（繁體） ∙ +/−