Half-ducat, 1665, Vilnius mint
John II Casimir Vasa (1648 - 1668)
Obverse: Twenty-seventh bust.
Lettering: IOAN CAS REX / • T • L • B •
Reverse: Monogram 
below crowned tenth Knight.
Lettering: MON AVR MAG DVC LIT 1665 / /
Identification
Ivanauskas, E. (2013). Coins and Bars of Lithuania 1236-2012 (Vol. 2). Kaunas: Author
number: 9JK3-3
Rarity: RRRR (Not more than 10 pieces)
Main data
Denomination: Half-ducat
Value: 90
Currency: Groat
Year: 1665
Type: Regular
Minting
Mint: Vilnius
Minting type: hammered
Parameters
Material: Gold
Diameter (mm): 17
Shape: Round
