Envelope has been mounted on a notebook divider. Signed in black without inscription. The 10/1/19 hand written below the envelope refers to Mussill's birthdate of October 1st 1919, 1944 is the season he spent with the Phillies. We guarantee all uncertified autographs to pass 3rd party authentication with CAS our authenticator of choice. If you want to get autographs certified you need to notify us before you pay. We submit them for you. If an autograph doesn't pass we refund both the purchase price AND the authentication fee.