| 337 | Captain America (1st Series) | 1st appearance of Serpent Squad; 1st appearance of Puff Adder; 1st appearance of Copperhead; 1st appearance of Black Racer; 1st appearance of Fer-de-Lance; 1st appearance of The Captain |
| 337/NS | Captain America (1st Series) | 1st appearance of Black Racer; 1st appearance of Copperhead; 1st appearance of Fer-de-Lance; 1st appearance of Puff Adder; 1st appearance of Serpent Squad; 1st appearance of The Captain |