A sound dirham is intact, whereas a ghallah piece may be clipped or less desirable. In a same-silver exchange the governing test is equality by the recognised weight, not visual finish or market preference.
Accordingly, the example is valid with the required equal weight and possession. Counting three coins on each side without weighing them is not sufficient.
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Coin quality does not replace weight equality
Bab al-Sarf: Mixed Currency Exchanges, Debased Coins and Obsolescence
A sound dirham is intact, whereas a ghallah piece may be clipped or less desirable. In a same-silver exchange the governing test is equality by the recognised weight, not visual finish or market preference.
Accordingly, the example is valid with the required equal weight and possession. Counting three coins on each side without weighing them is not sufficient.