Comic Title: Batman #172
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: June 1965
On Sale Date: April 15, 1965 Newsstand Date April 15, 1965
Source: House Ad, Green Lantern #37, Page 14

Copyright Date April 15, 1965
Source: Library of Congress, Periodicals 1965

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

Title: "Attack of the Invisible Knights"
Pages: 13

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

Writer: John Broome
Penciller: Sheldon Moldoff
Inker: Joe Giella

Reprinted In:
Showcase Presents Batman Vol. 1 TPB (2006)

Feature Character(s)

• Batman (last appearance in Detective Comics #339; next appearance in Batman #172)

Supporting Character(s)

• Robin (last appearance in Detective Comics #339; next appearance in Batman #172)
• Commissioner Gordon (last appearance in Detective Comics #338; next appearance in Detective Comics #340)

Villain(s)

• Thomas Jenkins and Wilbur (a museum guard and his brother; no further appearances)

Other Character(s)

• Dr. Harris (an archaeologist; no further appearances)
• A museum curator (no further appearances)
• The Duke of Darnham and three knights (appear in flashback; no further appearances)

Synopsis:
Batman and Robin are called in when a museum guard is attacked by three empty suits of armor. A legend says that the armor belonged to three knights out to destroy several opals. The opals are also on display in the museum. Batman and Robin stake out the museum, but they too are attacked and knocked unconscious by the suits of armor.

When the Dynamic Duo recovers, they find the opals smashed. Batman suspects that magnets were used to move the armor. He traces the magnets to the museum guard and his brother. The brothers stole the real opals and used the legend as a cover for their scheme. Batman and Robin apprehend them and return the opals to the museum.