This 1923 Jimmy Wilde 103-0 streak Burstein Issacs Empress Cigarette Boxing Mix Type Card #9 PSA EX 5 is the exact item you will receive and has been certified Authentic by PSA & REM Fine Collectibles. The Name type is Upper & Lower Case. 

William James Wilde (15 May 1892 – 10 March 1969) was a Welsh professional boxer who competed from 1911 to 1923. 

Managed by Teddy Lewis, reserve captain of the local rugby club, Pontypridd RFC, Wilde went undefeated in 103 bouts, all of which were held in Britain, a remarkable achievement. In the middle of that streak, on 31 December 1912, he won the British 7 stone championship by beating Billy Padden by an eighteenth-round knockout in Glasgow. 

He held the IBU world flyweight title in 1916, the EBU European flyweight title twice; firstly in 1914 and again from 1916 to 1917, the BBBofC British flyweight title in 1916 and the National Sporting Club's British flyweight title from 1916 to 1918.

Often regarded as the greatest British fighter of all time, he was the first official world flyweight champion and was rated by American boxing writer Nat Fleischer, as well as many other professionals and fans including former boxer, trainer, manager, and promoter, Charley "Broadway" Rose, as "the Greatest Flyweight Boxer Ever". 

Wilde earned various nicknames, such as "The Mighty Atom", "Ghost with the Hammer in His Hand", and "The Tylorstown Terror" due to his bludgeoning punching power. While reigning as the world's greatest flyweight, Wilde would take on bantamweights and even featherweights, and knock them out.

In addition to his professional career, Wilde participated in 151 bouts judged as newspaper decisions. Of these, the results were seven wins and a single loss, with 143 being declared as no decisions. Wilde had recorded the longest unbeaten record without a loss in boxing history.

This set of 50 cards features top boxers at the time of issue. The release was distributed by London tobacco company Burnstein Isaacs & Company for their Empress Cigarettes brand.

The cards picture black and white images of the fighters and include their names and a card number on the front. Backs include the Empress / Burnstein Isaacs names as well as a biography of the subject on the front.

Of note here is that two variations of the cards exist. The differences are minor but they are there. The font for the names on the front can either be found with capital letters or with a mixed case of capital and lower case. 

The font on the backs varies, too. One type has some of the text larger (the header and footer information) and further away from the borders while the other type is the opposite.

The series is headlined by Jack Johnson and Jack Dempsey, but also manages to include about 20 additional Hall of Famers as well.