While we're at it, does anyone know the configuration of Ross Allen's Model 5? Handle material, blade length, etc.

In this video at 3:14, Allen can be seen wearing a knife, but I can't make out if it's a Randall. Never the less, it's a cool video and a look at a tough, brave man who chose a Randall as his knife. If you're interested, here's a good photo of him that I wasn't able to load.

In this book, Stolen World: A Tale of Reptiles, Smugglers, and Skulduggery, the author mentions Allen's Randall knife and more about the man himself.