This is for a 1929 show pass signed by John Ringling. 

Signature: Black Ink Pen

Authentication: PSA/DNA Slabbed

John Nicholas Ringling is the most well-known of the seven Ringling brothers, five of whom merged the Barnum & Bailey Circus with their own Ringling Bros World's Greatest Show to create a virtual monopoly of travelling circuses and helped shape the circus into what it is today. In addition to owning and managing many of the largest circuses in the United States, he was also a rancher, a real estate developer and art collector.