Half-penny type with the letters SA - the second co-regency of Simon and Andrew, dated to the short period 1404-1406 (letters SA instead of AS).
A beautiful, selected piece, mint fresh condition.
High grading of NGC - MS63.
Definitely recommended.
Obverse: crown, in the rim: +MONE WLADISLAI
reverse: eagle, in the rim: +REGIS POLONIE