The Paquet reverse design with tall letters. About a dozen are known.
This reverse was also used in the following years:
1858 on J221/P264.
1864 on J384-J385/P452-P453.
1865 on J423-J424/P495-P496.
The latter two years are likely fantasy pieces deliberately made for sale to collectors circa 1868 to the early 1870s.