BIBLIOGRAPHY
TDV İslâm Ansiklopedisi「Akçe」(Halil Sahillioğlu)
Türkiye Diyanet Vakfı(Halil Sahillioğlu)

Claims Supported by This Source
- Orhan's coins are dated 727 (1326–27).
- Weight of the akçe: 1.181 g in 1431 → 0.931 g in 1460 → 0.768 g in 1480.
- Fineness from the late 15th to the first half of the 16th century was 900/1000.
- The gold sultani began to be struck in 1478, during the time of Mehmed II.
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