This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Cleaned spots and scratches, removed writing.
This is a featured picture on Wikimedia Commons (Featured pictures) and is considered one of the finest images. See its nomination here.
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 (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.