Case 1: A price of 20 circulating copper coins may be owed without identifying the precise physical pieces, provided the amount and monetary convention are known.
Case 2: The agreement concerns 20 obsolete coins as articles of property; their individual identity matters because they no longer constitute ordinary circulating payment.
The decisive contrast is the coin's customary monetary role, not just its colour or metallic weight. Other contractual conditions still apply.
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The same metal, two legal roles
Bab al-Sarf: Circulating Fulus, Obsolete Coins and Money-Changer Exchanges
Case 1: A price of 20 circulating copper coins may be owed without identifying the precise physical pieces, provided the amount and monetary convention are known.
Case 2: The agreement concerns 20 obsolete coins as articles of property; their individual identity matters because they no longer constitute ordinary circulating payment.
The decisive contrast is the coin's customary monetary role, not just its colour or metallic weight. Other contractual conditions still apply.