Pattern 3278 Spode earthenware/pearlware Dessert Plate produced c1821 by Spode & measuring 8 inches or 20.3 cms in diameter.
The first version (as far as I am aware), was Spode's pattern 3205 which was this design above but produced only in pink & blue enamels together with the use of gilt highlights; this copied the example of an 18th century Oriental Export porcelain plate exactly, see below for the original design.
An illustration (black & white photo) of Spode's pattern 3205 can be found in Robert Copeland's book, 'Spode's Willow Pattern and other designs after the Chinese' in the 1990 edition pl 12 on page 128. It is a 24.8 cm bone china plate described as, 'printed outline in ultramarine and filled in with pink on glaze; veins of leaves gilded, marks printed in blue and in red'.
The next version was Spode's pattern 3222 which was the same as the first version but without the gilding, obviously a cheaper option. You can see one illustrated on the excellent Spode Exhibition Online website, here is a link: http://www.spodeceramics.com/pottery/printed-designs/patterns/pattern-3222
This wonderful version above includes the use of many more enamel colours; I can see a more subtle pink more towards madder red, orange & pale apricot and a soft green together with the gilt highlights & a brown enamel rim. In my opinion, this is a much more desirable plate, which would have cost more to produce c1821 than any of the other previous versions.
The base of this plate is extremely well documented. It has an impressed 'SPODE' with the serifs dating it to the 1812-1833 period, a blue printed 'SPODE' & its pattern number '3278' has been applied by hand in red enamel. There is also an old collector's label, this plate was part of the Lowe Collection.
Seen in more detail here.
An 18th century Oriental Export Porcelain Plate which Spode copied to produce his pattern 3205 c1821.
The original design was decorated on the reverse as well, something which Spode didn't copy on this particular design although he had on many others.