Hi there. Here's a copy of Unknown Worlds Of Science Fiction Number 1 (1976). Its a one off & not the FIRST Number one.  The comic is Fine with a small split/tear on the spine approximately 1cm long. There is a very small crease on the bottom right hand corner of the front cover. There are three small rips on the back cover ( see all photos) & some discolouration.  All gradings are my estimate.  Thanks for looking and have a great day