To start off i've got a megalodon tooth between 2 to 25 million years old, found in South Carolina.
We're gonna need a bigger
my paternal grandfather who was a sergeant in the Gordon Highlanders
So was mine (although that's about the extent of my knowledge). My dad was in the GH too for a brief period of time.
They do have a regimental museum, I thought about donating the stuff at one stage but decided against it. Can't recal the details but it was still going a few yearrs ago. The museum will no doubt help if you want to know more info.
Edit, in fact it was the first results in a search as it happens.
http://www.gordonhighlanders.com/