Those are a line called St. Justin's buckles. I'm assuming it came in a purple velvet drawstring pouch?? Little card inside with the Cornwall maker info on it?

I have what they call a #1. I wear it with my black UK original.

I got my belt from http://www.renleather.com

The black belt on the right is 2 1/2". I ordered it without a buckle as it snaps to change the buckle out if you want. Very good quality leather.