The Tinkerer wouldn’t be seen again until over a decade later.
Amazing Spider-Man (Vol. 1) #2
Published: c. March, 1963?
Cover Date: May, 1963
“The Uncanny Threat of the Terrible Tinkerer!”
Writer: Stan Lee
Artist: Steve Ditko
Inker: Steve Ditko
Letterer: Artie Simek
@hornacek: Len Wein explained that Tinkerer being an alien was a ruse in ASM #160. Roger Stern explained in Spec #51 that the aliens themselves were a ruse and Quentin Beck happened to be one of them at the time.
“One of the greatest menaces I’ve ever faced!” Come on Spidey – this is your second issue. How many menaces have you faced so far?
As far as the Tinkerer not appearing for another decade, Stan and Steve portrayed him here as an alien, still figuring out what type of book this would be – would Spidey be fighting supervillains, or monsters and aliens? Once they figured out that it would be the former, they likely wanted to pretend this alien invasion story (which reads more like a Twilight Zone/Outer Limits episode than a typical Marvel alien invasion story) never happened.
Was it Roger Stern in Spec who retconned that Tinkerer was not an alien and the whole alien invasion was just a ruse? Or did he just retcon that Quentin Beck was one of his aliens here?