Chinese(???) 16'' blue/white plate (41cm)

[Stan]

From looking at all the photo's, the mark is not very clear, could you post a clear photo of the mark only, Some of the Longevity marks point to a province.

[askent]

Hi:
Here it is:

[Stan]

The mark is upside down, as Peter stated it is a Longevity character, this is a Japanese plate from the early Showa period or later in my opinion, the Chinese reading of this Character is Shou. It is difficult to tell exactly where this was made being vintage 20th century but my guess would be Seto.