India batav 1815 1/16 G - unlisted date?

Appears like KM#76

  KM# 279    Netherlands East Indies  - Guilder (16th century-1817)    Sumatra, Island of    1814-1816

http://www.ngccoin.com/poplookup/WorldCoinPrices.aspx?category=150212&worldcoinid=358869

   I only found it as ...
https://en.numista.com/catalogue/pieces6604.html
 says 1/32 on the coin but the page calls it a 1/2 duit. So as yours is 1/16 then I guessed that twice 1/32 = 1/16 so twice 1/2 duit = 1 duit. Then on that NGC site I typed duit as the currency, and 1815 as the date, and found that.  

   If that is your coin you can add it, as after KM# 271 is KM# 280 so not currently on here.
https://en.numista.com/catalogue/contributions/nouveau.php

  Although ...

https://en.numista.com/catalogue/pieces39612.html

   it is actually on here already !  There were five coins found in my Search for 'Batav' and that was one of the results. The title is '1 Duit (Sumatra)'  on there. The page does not have a KM# so I will add it.

Thank you, how right you are. I need to search more carefully!