Is this white 15cm Crown Lynn Vase hand potted?

I am wondering if this vase is hand potted or a four digit vase? I can't find the shape in the gallery.
It is 15cm tall and has four indentations beneath the blue Crown Lynn stamp near the rim which I can't make out. It feels hand potted. But I might be wrong.

I am not an expert on this stuff, but looking at the photo I would say it is hand potted... it looks very similar to the maroon one I have just posted, which is almost the same size as well. Mine has the same stamp on the base. I am aware of other similar white hand potted vases.