History of the 50-year medal:
"The Joslin Medalist Program at the Joslin Diabetes Center, in Boston, began awarding 25-year medals to people with type 1 diabetes in 1948. Eventually it became very commonplace for a T1D to live 25 years after diagnosis, so the 25 year medal was discontinued. There is still a nice certificate for 25 year T1D's, suitable for framing. Their 50-year medals began in 1970. This program has honoured over 5,500 people world-wide with 50-year medals since then.
After the first British citizen, Alan Nabarro, was awarded a 50-year Joslin medal in 1973, Diabetes UK created a 50-year medal of the same name. Closely following this, Diabetes Australia developed the Kellion Victory Medal in 1984.
In 2013, the Joslin Medalist Program partnered with the team of Diabetes Longevity researchers at the University of Toronto in order to facilitate the distribution of 50-year medals to Canadians with longstanding type 1 diabetes."
The following link gives the procedure for applying for the Joslin 50 year medal: