The men's 200 metre butterfly event at the 1964 Olympic Games took place on October 16 and October 18. This swimming event used the butterfly stroke. Because an Olympic size swimming pool is 50 metres long, this race consisted of four lengths of the pool.
Wikipedia[ - ]
The men's 200 metre butterfly event at the 1964 Olympic Games took place on October 16 and...
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The men's 200 metre butterfly event at the 1964 Olympic Games took place on October 16 and October 18. This swimming event used the butterfly stroke. Because an Olympic size swimming pool is 50 metres long, this race consisted of four lengths of the pool.
Wikipedia