This is a copy of Sub Mariner #15 published by Marvel in 1969. Cover pencils by Marie Severin and John Romita (alterations), inks by Joe Sinnott and John Romita (alterations). Script by Roy Thomas, pencils by Marie Severin, inks by Vince Colletta.
 
Last 12-cent cover-price issue.
 
"The Day of the Dragon," Namor returns to Atlantis where he is well received, but learns that Lady Dorma has been captured by Diane Arless who demands that Namor turn over her brother Tiger Shark; Namor comes to Lady Dorma's rescue and learns that Diane Arless has been influenced by Dr. Dorcas; Namor subdues the Dragon Man and convinces Diane that he genuinely wants to help Tiger Shark.
 
Letter pages pencils by Gene Colan, inks by Dan Adkins.