|British Empire Games|
At the 1930 Empire Games he won the gold medal in the bantamweight class after winning the final against Tommy Holt of Scotland.
His manager Victor Berliner was well known in British boxing circles.
On January 18, 1934, he defeated Johnny Cuthbert in fifteen rounds at the Royal Albert Hall for the British British Board of Control (BBofC) Lightweight Title. He lost the title on October 29, 1934 to Jack Kid Berg in ten rounds at the Royal Albert Hall in London.
Mizler was born in Wicket Street, St Georges in the heart of the East End of London to Jewish parents. They had a fish stall in Watney Street Market and after leaving school he worked in the stall along with his brothers Moe and Judah. In his teens he won the Federation of Working Men's Club's Bantamweight championship, which he held from 1929–30, and in 1930 won the ABA Bantamweight title.
- Harding, John and Berg, Jack (1987). Jack Kid Berg, The Whitechapel Windmill, pg. 193. Published by Robson Books, Ltd., London.
- "Harry Mizler". BoxRec. Retrieved 7 February 2016.
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