Similar coin :
Poland, Sigismund III (1587-1632), Ort (1/4 Thaler/18 Groszy), 1623, Bromberg Mint
SIGIS . III . D : G : REX . POL . M : D : LI : RVS . PRV . M
Crowned, armored half bust right with neck ruff, imperial orb in left hand, sword in right over shoulder, breaking inner beaded circle
SAM . LIV NEC . NSV-GOT . VAN Q . HRI R .
Crowned shield within collar of Order of the Golden Fleece, 16 | 23 across fields
Rolled flan
29mm x 30mm, 6.52g, Silver
Mintage: Unknown
KM -- (cf. KM 37 (39))
Note: Krause only lists 1620, 1620/21 and 1621 as dates for this issue and all are so rare that Krause does not list values in any grade. I think it's an oversight in Krause.
http://www.beastcoins.com/World/Poland/C1192.jpg