7 1/2 Réis - João VI Diu mint

Diu's mint operated under circumstances unlike any other Portuguese colonial facility — isolated on a small island trading post whose commercial importance had been declining for over a century by the time João VI was proclaimed King of Portugal, Brazil and the Algarves in 1816. The fractional réis coinage struck there for Portuguese India served local bazaar trade rather than any imperial ambition, produced in small quantities that were largely absorbed into circulation and lost to attrition.

Its absence from KM reflects how thoroughly these Diu issues fell through the cracks of mainstream cataloguing. The Gomes reference remains the only serious attempt to systematise them.