The envelope has the MMTB return address of PO Box 4528 Melbourne and the full name on the rear with the words within an oval. Red paper seals used to formally seal a document with a sealing press and MMTB name are 50 or 60mm in diameter. They were used to seal legal documents. The envelope and one of the seals have two holes punched in them - the size of cable tram bell punch hole.Demonstates a legal red paper seal and a MMTB Envelope.Set of three red paper seals with an adhesive back within a small white envelope.Has "Seals" written on the front of the envelope.tramways, legal agreements, mmtb, envelopes, seals