Australia: Aerogramme with Enclosure. Additional Postage Collected from Sender

„Enclosure“ handstamp on Australian aerogramme. Aerogramme treated as an underpaid air mail letter. Instructional handstamp „Underpaid Postage collected from sender“, endorsed „60 c“ to make up for the $1 rate for air mail letters to European destinations, which was in place from Sep 25, 1986 – the day the aerogramme was posted.