Yes, it's a Claude Gordon model Benge. I sold one a while back on Ebay here:
eBay: 1979 Benge CLAUDE GORDON -CG- Trumpet - GREAT Shape -NR (item 230086445402 end time Feb-10-07 21:17:36 PST)
In that listing is a copy of an advertisement showing Claude endorsing the Benge. They are really nice playing horns! I also have a Selmer CG which is very similar. I couldn't decide which one to keep so the Benge went.