His WWI draft registration card, filed 12 Sep 1918, records John Jack Jr., age 18, born 12 June 1900, residence Nelsonville, Athens Co., Ohio, occupation coal miner, employer Essex Coal Co., nearest relative John Jack Sr., Nelsonville, Ohio, physical description medium height and build, blue eyes, dark hair.

Since he was listed as age 11/12, born June 1899 in the 1900 census, his age and birthdate are off by one year here.

The SSDI lists John Jack, born 13 June 1899, died Dec 1970, last residence Columbus, Franklin Co., Ohio, SSN issued in West Virginia before 1951.

The Ohio deaths database lists John W. Jack, age 71, died 22 Dec 1970 in Columbus, Franklin Co., residence Reynoldsburg, Franklin Co., married.