That's a nice belt and in good condition. I've casually collected these belts for the past year or so and concur with others regarding dating to late 19th century and multi-purpose. Without provenance, it's difficult to determine true purpose. I think there are 1-2 examples out there which have 'BBC' listed on them...those are beyond difficult to find.
Regardless, these are beautiful displays pieces and Cairns and Bros. were the primary manufacturers...you'll sometimes find them with the brand mark on the belts. Here's the display that I've put together.
A great resource is the
NYC fire museum. Do a search for 'belt' and you'll see some superb early examples.