A very rare type of medal.
The work of the studio of Wincenty Stefan Wisniewski in Warsaw (signed WW and W. WIŚNIEWSKI).
By Jacek Strzałkowski described in two varieties: with correct dates (357 R) and with wrong date of the outbreak of the Uprising (356 RR).
The present one is an undescribed variety - with the correct date on the obverse (29 NOV. 1830), but wrong on the reverse (1830 instead of 1831).