I found this listing for a KT ticket stub June 2, 1961 at the McCormick Place Theatre. Autographed by Nick, Bob and Dave. This must be pretty close to one of the last concerts with Dave Guard ? What do you think.?

https://www.ebay.com/itm/266692108285?itmmeta=01J0XKF2PHAPVRHXMC1NM6XXRB&hash=item3e18169ffd:g:8BwAAOSwloBjk3Qr&itmprp=enc%3AAQAJAAAA8FzqlE70FDfKcwMH8NmpaauQM%2FXaf0tawyz4v2PQNnuvTMJZo6lomFq%2FA3LzyJwxIkSbbIvdxj%2BV3JvRv4NYULiPGCyjm7ThdjL%2BtMiPGINVqYR3Pb0SaiNCmUstyR%2BWzXtL5A8kNGkPhDpc1MFloWV4Ma4bZ5PFBo6XSoh1t2ahlPjPw3gJzWEoj0czrvr2OPJhBAUKg1A%2F9x8OK5E0LhnuMMM1IAc8CdTcQRXaWowxHOR6hyTxnkNW1Wfm1D8GWcsNb3gwwONfPlneyj2UbRIhMkFDKaAn7bTNKbe5IV8q%2FJD61mk2UfGSSCqLxMmN3A%3D%3D%7Ctkp%3ABk9SR76rvLOHZA