I handled a collection of guns (perhaps 8 or 10) that were on consignment at Griffin and Howe a number of years ago which were engraved by the great Mario Abbiatico, he of FAMARS fame. They were done in the Bulino style and were nothing short of breathtaking.
I also saw a number of photos of Luciano Bosis guns which were engraved with beautiful women in XXX rated poses.