500
He set many flagpole-sitting records. He sat for 49 days on one flagpole. He once estimated that he spent a total of over 20,000 hours sitting on flagpoles. Flagpole sitting was a craze started in Baltimore, Maryland, in 1929.
"Shipwreck" Kelly (1885-1952) was famous for sitting for long periods of time. What did he have to do with flags?