Approximate consumer purchasing power, including currency-unit changes where applicable. Reference period is the stated calendar year, not today's prices. Displayed cents do not imply cent-level historical accuracy.
500.00 old French francs in 1905 ≈ 2,540.82 EUR in 2025. This compares consumer purchasing power, not currency redemption or investment value.
Published annual INSEE converter inputs (1901–2025), not interpolated. Currency conversion uses 100 old francs = 1 French franc and 6.55957 French francs = 1 euro. Historical index coverage changes over time; early indices are rounded coarsely by the source. This is an approximate consumer purchasing-power comparison, not a bank redemption rate, investment return or legal valuation. No wage or goods-price comparisons are shown because the legacy rows lack verified currency units.