As a loose forward, he was a big man for the time at 1.83m and 86kg and English rugby writer E H D Sewell noted: "Search where one may, a better forward than Seeling does not exist."
Charles Seeling Junior has donated his father's 1905-06 Auckland rugby union cap, a gold medal from the 1905-06 Originals tour, and an oil painting of Seeling to the New Zealand Rugby Museum.
Seeling's grandson Dylan has donated a chalk drawing of a cartoon of Seeling, while another grandson donated a 1906-07 Auckland rugby union cap to the museum.
Seeling's sporting career began in Wanganui, but in 1903, he moved to Auckland and a year later became part of the Auckland side that held the Ranfurly Shield from 1904 to 1909.
In 1910, he signed for English rugby league club Wigan and in the next three years scored 54 tries and appeared in three consecutive league finals.
He went on to make more than 200 appearances for the club and was captain for three years. His name was one of only six chiselled in stone at Wigan's home ground of Central Park.
In 1996, Seeling was inducted into the New Zealand Sports Hall of Fame and in 2001 became one of the New Zealand Rugby League's Legends of League.