Shouldham club badge has been design to reflect the historical significance of shouldham in the history of world football. The 1321 refers to one of the first references to football at Shouldham.
An early account of kicking ball games from England comes in a 1321 dispensation, granted by Pope John XXII to William de Spalding of Shouldham:

"To William de Spalding, canon of Scoldham of the order of Sempringham. During the game at ball as he kicked the ball, a lay friend of his, also called William, ran against him and wounded himself on a sheathed knife carried by the canon, so severely that he died within six days. Dispensation is granted, as no blame is attached to William de Spalding, who, feeling deeply the death of his friend, and fearing what might be said by his enemies, has applied to the pope."

Note Wikipedia entry (Abridged)...
Alfred John "Alf" Kirchen (August 26, 1913 – August 18, 1999) was an English footballer.

Born in Shouldham, Norfolk, Kirchen played for ShouldhamFC and for his county at youth level. He was signed by Tom Parker, the manager of Norwich City in 1933 and immediately impressed, scoring seven goals in fourteen League games, and three in four FA Cup games for the Canaries. He soon caught the eye of First Division champions Arsenal, and was signed for £6,000 in March 1935, at the age of only 21.

Kirchen arrived too late at Arsenal to pick up a League winner's medal (the club completing a hat-trick of titles that year). A right-winger, Kirchen had to fight for a first team spot with Joe Hulme (who started the 1936 FA Cup final ahead of him), but by the start of the 1936-37 season, Kirchen was the Gunners' first-choice right winger.

Kirchen became well-known for his pace and fierce shooting, which soon attracted international attention; he picked up three caps (and scored twice) for England on a 1937 tour of Scandinavia, his debut coming against Norway on May 14, 1937.

He finally picked up a League winners' medal as Arsenal won the 1937-38 title, but the Second World War intervened just as he was reaching the peak of his career. Kirchen served in the Royal Air Force as a PT instructor, which allowed him to continue playing wartime matches for Arsenal (he appeared 116 times, scoring 81 goals, as well as three more times for England), but a severe injury picked up in a match against West Ham United in 1943 forced his early retirement. In all, excluding wartime appearances, he played 101 official first-class matches for Arsenal, scoring 45 goals.

Kirchen later returned to his old club Norwich, as a trainer, before leaving football to become a farmer at Thwaite St. Mary and Hedenham in south Norfolk. He later returned to Norwich as a director of the club. He also served as Honorary President of the Norfolk branch of the Arsenal supporters' club. He died in 1999, several days short of what would have been his 86th birthday.