The commemorative 100 Escudos coin dedicated to Gil Eanes and Cabo Bojador was issued by Portugal in 1987 as part of the First Discoveries Series — a collection honoring the great Portuguese navigations. Below is a detailed overview of its physical characteristics, known variants, historical context, and its numismatic value.
Brief Historical Background
Gil Eanes was the navigator who, in 1434, successfully rounded Cabo Bojador — a key milestone for Portuguese maritime expansion along the African coast. The coin celebrates this achievement and is part of the “Discoveries” series, which honors explorers and locations tied to Portuguese voyages.
Technical Specifications (Most Common Version)
- Year: 1987
- Mint: Imprensa Nacional — Casa da Moeda (INCM), Lisbon
- Diameter: ~34 mm (some sources indicate 33.5–34 mm)
- Weight: 16.5 g
- Edge: Reeded
- Design (Obverse/Reverse): Nautical motifs such as a caravel or ship associated with Gil Eanes, with inscriptions “GIL EANES • 1434 • CABO BOJADOR” and the year. Engraver: S. (Raul) Machado.
Metals and Variants
This coin exists in several collectible versions:
- Cupro-nickel (most common, circulation commemorative) — intended for collectors, widely available; catalog number KM 639.
- Silver (.925) — collector / uncirculated / proof version — typically sold in a collector’s case, limited mintage. Cataloged as KM#639a, with approximately 22,000 pieces produced for certain variants.
- Gold (proof) — strictly commemorative, very limited mintage, aimed at luxury collectors.
Note: Mintage numbers and KM catalog designations may vary; exact reference requires consultation with Krause/Schön catalogs.
Condition and Rarity
- Cupro-nickel version: relatively common, available in circulated or UNC (Uncirculated) condition.
- Silver and gold versions: highly sought after, especially in proof or original packaging. Their rarity depends on mintage and preservation (BNC / FDC / Proof).
Indicative Market Values (Nov 2025)
Prices vary according to condition (Good / VF / XF / UNC / Proof) and metal:
- Cupro-nickel (circulated): ~€1–€5
- Cupro-nickel UNC / Brilliant: €5–€15
- Silver (.925), uncirculated / BNC: €15–€80, depending on condition and seller
- Silver or gold proof: most valuable; silver proof can reach higher tens of euros, gold proof can reach hundreds of euros depending on weight, fineness, and collector demand
These are indicative values from online listings, shops, and auctions. Actual prices depend on condition, original packaging, certification, and current collector demand. For precise valuation, consult auction houses, specialized dealers, or a local numismatist.
Practical Tips for Owners or Buyers
- Identify the version (metal / finish): color, shine, and mint markings help distinguish cupro-nickel, silver, or gold.
- Assess condition: scratches, tarnish, or loss of luster reduces value; UNC or Proof coins are worth significantly more.
- Use catalog references: check KM numbers (KM#639, KM#639a, etc.) and platforms like Numista or Ucoin to compare images and descriptions.
- Consider grading certification: for silver or gold coins, certification by a reputable grading service can boost buyer confidence and final price.
