3 Réis and 5 Réis Coins of King Luís I (1861‑1889)
The 3 Réis and 5 Réis coins of King Luís I (1861‑1889) represent the lowest‑denomination issues of the period and are divided into two distinct monetary systems. The first system, struck in copper between 1867 and 1879, includes the larger‑module coins bearing the Roman‑numeral denominations III Réis and V Réis. The second system, minted in bronze between 1882 and 1886, introduced the reduced‑module V Réis. These issues are notable for their simple design, the transition from copper to bronze, and the continued use of Roman numerals on the coinage, reflecting the monetary style of late 19th‑century Portugal.