Please help to identify this vase (signed)

[lefno]

Hello
Does anyone recognize this marking?
Approximately how old is the vase?
Is it mass production or unique/valuable vase?
Height is 56 cm
Would be very thankful for any information!

[peterp]

These are no known characters of the three major Far Eastern Languages. Nor any other character type I recognize. Looks more like fancy symbols.
The whole vase is painted in colors only used in the 20th century. But, before all, with Chinese porcelain this kind of bottom is typical for 20th century items. The roughness and uneven look of the base is not normal in antique Chinese porcelain.