Newton Comics' The Amazing Spider-Man #10 was published 11 October 1975:
The cover is from Marvel's The Amazing Spider-Man #9:
The story contents are as follows:
The Man Called Electro!, originally published in The Amazing Spider-Man #9, February 1964
Thor and Loki Attack the Human Race!, originally published in Journey into Mystery #94, July 1963
Only the first six pages of the Thor story are reprinted in this issue. It continues next issue.
The Silver Surfer poster in this issue originally appeared as the splash page to the story ..To Steal The Surfer's Soul in The Silver Surfer #9:
The swap card is Fantastic Four Series A (1 of 15) No. 4.
The expiry date for the contest is 24 November 1975.