Here's a high resolution scan of the Miskatonic Australian expedition lapel pin. The harsh lighting of the scanner reduces the contrast between the raised and textured portions of the die strike, but it gives you a good idea of the level of detail on the 1" wide medallion.
The craftier readers will be happy to know that the backing mount can be removed with a file or dremel tool in about 30 seconds. That means creating custom items is a simple matter of using a drop of epoxy to attach the flat portion of the pin to any suitable surface. I've been cruising Ebay for a vintage brass Zippo lighter (first produced in 1933) with exactly that idea in mind.