Enrique Breccia - Marvel X-Page

As I said before, I never get tired of seeing Enrique's works and I couldn't help but add this nice page to my collection, since it was quite a bargain :)
I'm always impressed by his inking technique and by the amazing details he puts in every single panel!
I think this page is from some Marvel X-Book or, more likely, it's a try-out for Generation X (thank you Claudio for the hint). Any further info will be greatly appreciated! :)

(pen and ink on artboard, roughly 9"x 13")

Click HERE to see all Breccia's art in my Gallery