Boot? yes; Cowboy? That implies a USA bias. Many cultures wear boots. Not only Bovine/Equine herders. Military wore boots, mounted or not.
Does it have an edge? Is it on the inside of the curve? If both are true, I'd go with the grass trimming sickle. Maybe some noble had them made for his minions and wanted to show off that he was so rich even his slaves and low class servants had fancy tools. The different colour metallic bands suggest afghan.
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