Here's a trio of promotional pieces by the great John Romita Sr...
Marvel Super-Heroes Are Here! Romita designed this for drugstores and mom and pop shops selling comics? The way the figures are depicted, and their choices (Namor, Black Bolt, Silver Surfer alongside the Avengers, Hulk, Spider-Man, etc) make me think this was done in the early 1970s. Or perhaps the late 1960s--I see that Captain Marvel is wearing the original white and green costume designed by Gene Colan.
Wolverine in action! Circa 1985, this was a pinup or a poster piece.
Spider-Man Birthday card! No coincidence, today is also my birthday. This was an illustration Romita made for Diamond Distributors on their 10th anniversary. Pretty good to get a hand drawn card from the master, eh? Nuff Said!