Spider-man cartoon 1967 blue pencil swinging

"Jazzy" Johnny Romita is credited as a consultant on the 1967 series, and this blue pencil drawing from the show's files bears some resemblance to Romita's rough prelims he did for the Marvel trade paperbacks in the 70s. But of course that's a decade later than this would be and most other work of his from the 1960s has a different feel. So, aside from that similarity there's nothing to indicate who the artist is. I cannot recall from where I obtained this and have not authenticated this but it seems to be a genuine piece from the series.