1st appearance of Batman

1st appearance of Commissioner Gordon

💰 Detective Comics #27 has sold for over one million dollars 4x with a record high sale in 7.0 for $1.5 million (Nov 2020)

2nd appearance of Batman

Hypodermic needle cover

1st appearance and origin of Hugo Strange

Debut of Batman's finned gloves

Final solo adventure of Batman in the Golden Age

1st appearance and origin of Robin

1st appearance of the Joker

1st appearance of the Cat, Selina Kyle, later becomes Catwoman

Debut of the first Batplane which has multiple designs from one issue to the next including Batman #3 and Batman #4

💰 Batman #1 sold for over one million dollars 3x with a record-high in 9.4 for $2,220,000

Scarce printing variant, identified by the absence of a period before the issue number '1'

1st appearance of the Joker and the Cat aka Catwoman

3rd appearance of Robin

1st appearance and origin of Clayface, Basil Karlo

1st cover appearance of the Joker in Detective Comics

1st solo story featuring Robin

2nd appearance of the Joker

2nd appearance of Catwoman, Selina Kyle

This issue is the first time Selina Kyle is referred to as Cat Woman, used interchangeably with The Cat

Debut of the first Catwoman costume, a mask resembling an actual cat

1st appearance of Puppet Master

1st appearance of the Joker in a Detective Comics story, previously appeared on the cover of Detective Comics #40

Death of Dr. Hugo Strange, fell to his death after being punched in the face by Batman while standing near the edge of a cliff

First mention of Gotham City

1st appearance of Jack of Diamonds aka Dr. Deegan

First mention of Batman’s vehicle referred to as the Batmobile

First mention of Gotham City in the Detective Comics title

🥈 Runner-Up: New High [Previous High]

2.0 sold for $2,000 [$1,000 in July] +100%

2nd appearance of Clayface, Basil Karlo

Milestone issue #50

Debut of the Batmobile design with the bat-shaped head on the front

1st appearance of Linda Page

Cover art similar to #33 with Robin added

Cover art by Bob Kane featuring Batman and Robin

Origin of Green Lantern, Alan Scott, retold

Classic cover art by Bob Kane

1st appearance of the Penguin

[March 2022 - Colin Farrell will reprise the Penguin in an HBO Max spin-off]

Classic cover art by Fred Ray

Early Golden Age issue of Green Lantern, Alan Scott

Iconic cover art by Jack Burnley

First Christmas story in the Batman title

World War II cover art by Martin Nodell featuring Nazis

Cover art by Jerry Robinson featuring the Joker

1st appearance and origin of Boy Commandos

This issue marked the beginning transformation of The Joker from a homicidal maniac into a goofy character. This persisted until Batman #251 when Denny O'Neil and Neal Adams revived the Joker after a four year absence, reintroducing his homicidal side

3rd cover appearance of the Joker, first cover appearance in the Batman title

Green Lantern, Alan Scott, joins the army

1st appearance and origin of Two-Face

1st appearance of Gilda Dent, the wife of Harvey Dent

1st appearance of the Batcave, unnamed, referred to as an underground hangar

1st cover appearance of the Penguin

2nd appearance and first cover of Two-Face

Cover art by Jerry Robinson featuring the Joker

Cover art by Jerry Robinson and Bob Kane featuring Two-Face

1st cover appearance of the Batmobile

1st appearance of Merlin

Cover art by Dick Sprang featuring the Joker

1st cover appearance of Alfred

First solo story featuring Alfred

First time two major Batman villains team-up - Joker and Penguin

Re-titled Miss America Magazine, formerly Miss America Comics

1st appearance of Patsy Walker, later becomes Hellcat

1st appearance of Buzz Baxter, later becomes Mad-Dog

1st appearance of Hedy Wolfe, friend and rival of Patsy Walker

Classic cover art by Dick Sprang

Debut of the first official Catwoman costume that would become iconic to her character

Selina Kyle's hair is blonde in this issue

Batman and Robin fight the mechanical T-Rex that would later decorate the Batcave for decades

1st team appearance and origin of the All Winners Squad: Captain America, Bucky, Human Torch, Miss America, Sub-Mariner, Toro and the Whizzer

Origin of Captain America retold

Classic cover art by Dick Sprang featuring the Penguin