Most marks of the old Imari porcelains were usually hand painted inside of a foot ring.
The same marks were used in the different periods, except a few which only appeared in
the particular period or were used exclusively by a certain maker of that period.
Uzu-fuku          渦福

Fuku (huku) mark with spiral stroke in the kanji character
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Marks  
Fuku Mark
A kanji character, fuku (huku).  It means happiness
Good Fortune  and Rare Fine Object Marks
Hizen Marks
Other regions
IMARI
Hizen Imari Porcelain Marks
Sometsuke Plate  1740 - 1770           No.93
Sometsuke Plate   1750 -1780
Sometsuke Plate  1720 -1740
Hasami  Kiln
Sometsuke Hakkau-zara   1780 -1810     No.24
Iroe Bowl  1750-1790
Kaku-fuku        角福

A kanji character, fuku in squares
Yama-fuku       山福

Fuku
(huku) mark with abbreviation of a kanji of yama on top : yama means mountain