日本語コインガイド PF70とは？プルーフコインの最高評価と価値を解説
PF70とは、NGCがプルーフコインに付ける状態の最高グレードです。数字の70の意味、５倍拡大での評価基準、ラベルの記載位置、価格や希少性との関係を、初めての方にもわかりやすくご紹介します。
Journal
日本語コインガイド 
日本語コインガイド アンティークコインとは？初心者向けに価値と歴史・芸術の魅力を解説
アンティークコインとは、古い時代に発行され、収集品として親しまれているコインのこと。歴史や芸術を楽しむ魅力、希少性や保存状態によって価格が変わる理由、鑑定済みコインの意味を初心者向けにやさしく紹介します。好きなデザインから楽しむ、その世界に触れてみませんか。
Coin Guide What Is a Certified Coin?
A guide to certified coins, third-party grading, slabs, labels, and why certification matters for collectors.
Coin Guide Bullion Coins and Collector Coins: What Is the Difference?
A simple guide to bullion coins and collector coins, including metal value, design, condition, and premiums.
Coin Guide What Is a Proof Coin?
A guide to mintage and how the number of coins issued relates to rarity, survival, and collector demand.
Coin Guide What Do Coin Grades Mean?
A clear guide to coin grades, including MS, PF, AU, the 1 to 70 grading scale, and how condition, certification, and visual quality affect coin collecting.
Coin Guide What Is The Royal Mint?
Learn what The Royal Mint is, why it matters in British coin collecting, and how its history, designs, commemorative coins, and collector issues relate to numismatics.
Coin Guide What Is a Crown Coin?
A simple guide to British Crown coins, from the historic five-shilling crown to modern commemorative £5 crowns.
Coin Guide Why Are Antique Coins Expensive?
A beginner-friendly explanation of why antique coins can be expensive, including rarity, condition, history, demand, and certification.
Coin Guide PF69 and PF70: What Is the Difference?
A clear guide to the difference between PF69 and PF70, and how collectors should understand proof coin grades.