I was feeling kind of Rich Bucklery today, and pulled up a
chronological list of all his work at comics.org.
The first covers he did were on AVENGERS, most covers from 101-113. And for ASTONISHING TALES (Kazar, Man Thing), FEAR (Man Thing) and others, from roughly late 1972-1973. I was struck how generically Marvel they were, aping John Buscema and the other Marvel hacks of the time. It was not until around 1974-1975 that his work really took on a distinctly Buckler linestyle. The titles I recall reading where his work had a clear distinctive look were AMAZING ADVENTURES/Killraven, JUNGLE ACTION/Black Panther, and a DOC SAVAGE pulp adaptation series.
Here's a cover Buckler did for AMAZING ADVENTURES 24, May 1974:
...which is still, while nicely finished by Janson, in the generic Kirby/Buscema/Kane Marvel house style.
Here is a DOC SAVAGE 7, Oct 1973 cover, that to me looks much more distinctly Buckler:
