Comic Title: Superboy #138
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: May/Jun 1967
On Sale Date: March 14, 1967 Newsstand Date March 14, 1967
Source: House Ad, Adventures of Jerry Lewis #100, Page 12

Newsstand Date March 14, 1967
Source: Direct Currents, Batman #191, Page 32

Newsstand Date March 14, 1967
Source: Newsdealer Magazine, V22 #4

Copyright Date March 14, 1967
Source: Library of Congress, Periodicals 1967

Frequency: Monthly, with the exception of Feb., Aug., and Nov.
Cover Price: $0.25
Page Count: 80
Editor: Mort Weisinger

See Also: The Guide to DC Giants

Notes:
This issue is labeled 80 Page Giant #G-35.

Title: "Duel of the Superboys"
Pages: 23

Feature(s):
Superboy (of Earth-1)

Writer: Otto Binder
Artist: George Papp

Reprinted From:
Adventure Comics #287 (1961)

Feature Character(s)

• Superboy (last appearance in Adventure Comics #286; next appearance in Adventure Comics #288)

Supporting Character(s)

• Krypto (appears in flashback; last appearance in Superboy #104; next appearance in Superman #173)
• Jor-El (appears in flashback; last appearance in Superman's Girl Friend, Lois Lane #26; next appearance in Action Comics #281)
• Lara (appears in flashback; last appearance in Superman's Girl Friend, Lois Lane #26; next appearance in Action Comics #281)

Villain(s)

• Dev-Em (the knave of Krypton; first appearance; next appearance in Adventure Comics #288)
• Norg-Ar and Rath-Ef (Dev-Em’s friends; no further appearances)

Other Character(s)

• Ron-Em and Leeta (Dev-Em’s parents; no further appearances)
• Several Kryptonians (no further appearances)

Flashback Appearance(s)

• Kal-El (last appearance in Superman's Girl Friend, Lois Lane #26; next appearance in Action Comics #281)

Cameo Appearance(s)

• Jonathan Kent (in flashback to Superboy’s arrival on Earth)
• Martha Kent (in flashback to Superboy’s arrival on Earth)

Comments:
This story continues in the first story of Adventure Comics #288.

This reprint also contains part of the first story of Adventure Comics #288. The two-part story is combined into a single story.

This story was original titled: "War of the Superboys".

Synopsis:
While Kal-El was still a small child living on Krypton, his family lived next door to Dev-Em, a juvenile delinquent. Dev-Em frequently stole inventions from scientists to convince his family he was intelligent. However, most of the time, he and his friends got in trouble with the law.

When Dev-Em stole some notes from Jor-El’s lab, he learned about Krypton’s destruction. To save himself from death, Dev-Em constructed a small lead dome which protected him and his family in suspended animation. When Krypton exploded, the dome was sent into space, where it eventually reached Earth. Dev-Em learns Kal-El has grown to become Superboy and decides to plot against his former neighbor.