The item has no copyright marks as can be seen in the links. At bottom right is a logo indicating the card was produced by a union print shop and Country of origin USA.
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.
2 The year of first publication. If the work is a derivative work or a compilation incorporating previously published material, the year date of first publication of the derivative work or compilation is sufficient. Examples of derivative works are translations or dramatizations; an example of a compilation is an anthology. The year may be omitted when a pictorial, graphic, or sculptural work, with accompanying textual matter, if any, is reproduced in or on greeting cards, postcards, stationery, jewelry, dolls, toys, or useful articles.
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.
Uploaded a work by {{unknown|author}} from [https://www.ebay.com/itm/295225064538?hash=item44bcc8fc5a:g:TTsAAOSwxs9hNYXs&amdata=enc:AQAHAAAA4H1JMWNoCFIB5axQZ2OIUwgAzu99EOOdfsjV2v6Lx/HVP7VtjF1oEmYLUQ5hbvIQbY4PiTJTeoE0XvYOWa8SxZKkBpksDXIGSRLG%2BXFpxuJkmEMVTxaSw1MsCAu0AvMZYnW1KB6bmW0KTdzU%2BZGi1GOScjhj8sJx%2BhGOo7U4ky1pS3avZPHMxLlxu1OTPppdI4baaYk/WB8ptXggbU9Ly9O5LVzFczv5b3p%2BC8/u%2BVWA2sXbVbhwV6m5K5GOWArpQ/c3VMcZ86k%2Bo4RHTYlxNttSML/l4QJbJHDWb5dVXQxq|tkp:BFBM4qWqwO5g eBay] [https://archive.ph/e...
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