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    Adventure Comics #300 (D.C. Comics, 1962). 9/1962 - Cover pencils by Curt Swan, inks by George Klein. The Super-Planet of Clark Kent and Lana Lang, art by George Papp; Lana and Clark are accidentally transported to a strange world where Clark must make her think they both have superpowers in order to prevent her from guessing he's Superboy. House ad for Superman Annual #5. Tales of the Legion of Super-Heroes series begins in The Face Behind the Lead Mask!, script by Jerry Siegel, pencils by John Forte, Al Plastino (page 4 and some Superboy and Luthor heads only), inks by John Forte and Al Plastino; At a regular meeting of the Legion of Super-Heroes, the Legionnaires lose control of their powers; Mon-el joins the Legion.

    Publisher: DC
    Category: Universal
    Page Quality: Cream to off-white
    Artists/Writers: Jerry Siegel & Edmond Hamilton stories George Papp, John Forte, Al Plastino art Curt Swan & George Klein cover
    Significance: Tales of the Legion of Super-Heroes series begins. Mon-El joins Legion.
    CGC census 1/20: 14 in 3.5, 188 higher.

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