Amazing Spider-Man (1963 1st Series) #105
Published Feb 1972 by Marvel.
Cover by Gil Kane and Frank Giacoia. First appearance of the Spider Slayer robot in The Spider Slayer!, script by Stan Lee, pencils by Gil Kane, inks by Frank Giacoia; Spencer Smyth builds J. Jonah Jameson a new Spider-Slayer robot, but JJJ doesnt know that Smyth has his own plans for the hunting-killing machine; Smythe uses cameras to spy on Spider-Man and watch him unmask. Reprinted in Marvel Tales # 84. 36 pgs., full color. $0.20. Cover price $0.20.