This is a First Day Cover that has been hand signed by the great, Johnny Sain & Warren Spahn. The cachet has been authenticated and slabbed by PSA/DNA. The serial number is verifiable online using PSA/DNA #84095279. The cover comes encapsulated in a tamper-proof cover. 100% authentic signature from Atlanta Braves legend, Johnny Sain & Warren Spahn. A great gift idea for a Atlanta Braves or MLB collector.