There is no drawing of the "compass" in the Art of book. There is however a concept drawing of the amulet, which wasn't designed by Mignola, but by storyboard artist Simeon Wilkins:

Thanks! And likewise, for sure - love the stuff you did. I also didn't do very much for Hellboy - I was actually quite busy on Spider-Man 2 at the time, but it was awesome to be able to contribute what little I did, especially on a "fan-boy" level - I've been a huge fan of the comics for a long time now.@D48thRonin - Very cool! Your prop work is awesome. I always loved that shot of HB lowering the eye-in-pyramid amulet towards the corpse... For Hellboy, I didn't do as much as I have on other projects, but what I did was fun work. It's the kind of stuff I really enjoy concepting and making. I made a lot of old paper things, ancient relics and various bits of arcana, designs, graphics, etc.. I made the gold ingots and a few other small items. Of course there's never enough time to do it exactly right, but I had fun being involved.
You need to quit teasing us and do a run for us nice folk!thumbsup