Conversation so far:
Can you provide me with a little information about Walter Winterbottom and his career as an England Team Manager?
Walter Winterbottom was England's first, youngest and longest serving England team manager. He is also the only England manager to have had no previous professional managerial experience.
How long did Walter Winterbottom serve as an England team manager?
Walter Winterbottom served as team manager for England between 1946 and 1962
How old was Walter Winterbottom when he first began his career as a team manager?
What led to Walter Winterbottom's career as a team manager?
In 1946 Stanley Rous who was the secretary of The Football Association, suggested Walter Winterbottom take on the responsibility of being the first England team manager.
Was Walter Winterbottom ever trained to become a team manager?
Walter Winterbottom is the only England manager to have had no previous professional managerial experience.

Question: What else is unique about this time as a team manager?
Self-contained rewrite: What else is unique about Walter Winterbottom's time as a team manager besides how long he served, what led up to his career, and his prior experience?