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Way in the last pages of this thick GIANT-SIZE DRACULA 5 issue (June 1975), is John Byrne's first professional sale to Marvel, an 8 page story scripted by Tony Isabella, with Byrne pencils, and inked by Rudy Nebres.
https://viewcomiconline.com/giant-size-dracula-5/It actually looks better than I recalled, but it doesn't look a whole heck of a lot like John Byrne. At all, actually.
The combination really doesn't look like John Byrne OR Rudy Nebres, to me it looks like Alex Nino.
(Compare to this 30-page Nino story in MARVEL TREASURY 19, "People of the Dark" ) :
https://viewcomiconline.com/marvel-treasury-edition-issue-19/For comparison purposes, here's Byrne's earliest run for Marvel, in MARVEL PREMIERE 25 (Oct 1975), and continued in IRON FIST 1-15 (Nov 1975- Sept 1977),
https://viewcomiconline.com/marvel-premiere-issue-25/https://viewcomiconline.com/iron-fist-1975-issue-1/The earlier mentioned John Byrne / Tony Dezuniga story in MARVEL TEAM-UP 70 (June 1978) is another comparable mismatch. (Byrne also penciled 53-55, 59-70, 75 and 79, for comparison).
https://viewcomiconline.com/marvel-team-up-1972-issue-70/Here also is Byrne inking himself in DOOMSDAY +1 series, issues 1-6 (July 1975-June 1976)
https://viewcomiconline.com/doomsday-1-1975-issue-1/
