Comic Title: World's Finest Comics #173
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: February 1968
On Sale Date: December 12, 1967 Newsstand Date December 12, 1967
Source: Direct Currents, Atom #35, Page 31

Copyright Date December 12, 1967
Source: Library of Congress, Periodicals 1967

Frequency: Monthly, with the exception of Jan., April and July
Cover Price: $0.12
Page Count: 32
Editor: Mort Weisinger

Title: "The Super-Key to Fort Superman"
Pages: 12

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

Writer: Jerry Coleman
Penciller: Wayne Boring
Inker: Stan Kaye

Reprinted From:
Action Comics #241 (1958)

Feature Character(s)

• Superman (last appearance in Action Comics #395; next appearance in Superman #122)

Supporting Character(s)

• Lois Lane (last appearance in Superman's Pal, Jimmy Olsen #29; next appearance in Superman #122)
• Jimmy Olsen (last appearance in Action Comics #395; next appearance in Superman #122)

Guest Appearance(s)

• Batman (last appearance in Batman #116; next appearance in Detective Comics #256)

Comments:
This is the first appearance of Superman’s Fortress of Solitude.

This reprint is presented "A Demand Classic" and is from "The Editor's Round Table".

Synopsis:
Superman visits his Fortress of Solitude where he can relax and work on experiments. He discovers a message written on the wall which reveals that an intruder has penetrated the Fortress. Superman seals the entrance, but later learns that the intruder has returned. When a cave-in seals him in a cavern with a Kryptonite rock, Batman appears and reveals himself as the intruder. Superman begins laughing because the Kryptonite is phony. He used the stunt to get Batman to reveal himself. The friends then celebrate the anniversary of Superman’s arrival on Earth.