THAT is the origin of "Stable Belts" - it was a way for cavalry regiments & the like to add more flair to their otherwise drab working dress uniforms.
Girth straps from saddles were modified into belts by the local saddler; some also had a leather pocket/pouch or two added. Things then became more formalised, though a lot of belts were issued "on purchase" by the recruit buying his from the NAAFI - it was an item approved for service use, but not issued.
Let me know if you need a length of this - as every time there is a strong wind here the ceiling rafters creak under the weight of all the rolls!! (Stored in the attic out of the way)