First, here's The Brave and the Bold #152, starring Batman and The Atom:
Now look a little closer at the signature, down there to the right of the UPC box:
And next, let's turn to Weird War Tales #53:
War comics were not a genre Jim delved into very often; aside from some war-themed team-ups in B&B, this is about it! Jim was supposed to do a backup for Blackhawk when Mark Evanier was writing it, but it didn't happen. I'd have enjoyed seeing him play in the battlefield more often: he certainly had the devotion to research that would have yielded convincing results.
Come back soon to see "A Survey of Signatures", where we examine Jim's more familiar marks!