Permalink Reply by JK on September 8, 2023 at 12:55pm
Could be a SASE provided by the requestor with Lennon"s office adding the return address, although there are a couple inconsistencies, such as the envelope not being a European size.
The signature seems to be on the back of something and oddly cut. It seems to be a very abbreviated signature but he took the time to add s nice doodle?