Netherlands East Indies, Island of Sumatra 1 Duit, KM# 282.1
Is this a mint error on the date, or is it just a contemporary counterfeit? Has the typical crude look of coins from this era, so may be legit but can't find any information about such error in this particular type. My concern is the rhombi in the crown though - they shouldn't be like that
This coin caught my eye since the duit coins were no longer minted in 1891. They got replaced with Stuivers, and then discontinued when the Dutch East Indies coinage changed to decimal system in 1854.