This is from the Clint Eastwood forum:
http://www.clinteastwood.org/forums/...13733#msg13733
The sixth post asserts Toscani's by quoting a book:
"Cheroot" is another style of cigar. It's possible he smokes them in some Westerns. However, in the Leone films he was definitely smoking toscani.
See Christopher Frayling's Sergio Leone: Something to Do With Death (2000), p. 182-183."
I have no idea whether this is true, but it probably is, because the internet is a very reliable source of information.