Detective Comics #155

In "Bruce Wayne, Private Detective!", the Caped Crusader takes a rare break from Gotham’s rooftops to step into the world of private investigation—subbing for a famed detective recovering from appendix surgery. With two high-stakes clients both desperate to claim a model train once owned by the notorious criminal Tracks Carlin, Bruce finds himself navigating a web of deception where every lead could be a trap. Written by Bill Finger and illustrated by Bob Kane and Lew Sayre Schwartz, with inks by Charles Paris, this 1950 classic features a cover by Win Mortimer that captures the noir intrigue of the tale.