Watch List notes:

WORLD COINS, MONTENEGRO, Nicholas I (1860-1918), Gold 20-Perpera, 1910, laureate head left, rev arms, on the 50th year of his reign, 6.76g (Schl 5; F 5). Fields a little scuffed, otherwise choice extremely fine and scarce.
ex Åke Lindén collection, Baldwin's Auction 87, May 2014, lot 1493

Estimate: £400-500