1 Sol - Manuel Isidoro Belzu 6th Bolivian constitution - Monetary Medal

Struck to commemorate the constitution promulgated under President Manuel Isidoro Belzu in 1851, this piece occupies an awkward category — neither purely a coin nor a conventional medal, but a monetized commemorative issued at face value. Belzu was a caudillo of genuine popular appeal, one of the few Bolivian leaders of the period who actively cultivated support among indigenous and mestizo populations, which made his constitutional moment politically significant enough to warrant a dedicated issue.

The .666 fine silver alloy places it below the standard coinage fineness Bolivia was then striking, a deliberate economy consistent with the country's chronic silver supply constraints in the early 1850s.