X-Men (1963) 79-A

Reprints X-Men #31

"We Must Destroy the Cobalt Man"
The X-Men earned another break, and you know what that means, as the group splits up but all find themselves in the same place. Jean, Warren, Ted and his brother Ralph head off to Ralph's laboratory where he unveils his newest invention, the Cobalt Armor (looks like Iron Mans Armor since Ralph used to work to Tony Stark). But as X-Men vacations and breaks go, they are forced into service to stop Cobalt Man before he turns into a C Bomb.