“The Complete Fantastic Four” was a British (UK) weekly series that ran for thirty-seven issues (September, 1977 to June, 1978). It was a magazine-size comic with color covers and black and white interior pages, although the comic length was the standard 16-pages (8 wraps). The first two issues came with enclosed plastic models.
I posted the the first two issues (front and back and the toy) below. I have the full series scanned on my just starting FF web site if you want to check out any other issues.