This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
DLZ Round the World . Cover carried on the airship DLZ Graf Zeppelin from Lakehurst to Lakehurst on the RoundtheWorld flight August September It required in postage the measuringworth equivalent today of about if based on the CPI The Cooper Collection of Zeppelin Postal History Centpacrr en PDUSGov US Stamps issued before