Help identifying this glass ashtray

Good morning,

I have a really thick heavy glass ashtray with bubble work. It is clear on the outside and amethyst/purple inside. The bubblework is confined to the purple glass.
There are 3 dents for the cigarettes to rest
On the outside are 12 ridges, these appear to have been drawn from the base to the top.
The base has been sheared and then an indented pointe

Thought this was Whitefriars due to the base pointe and the amethyst purple colour but I cant find it in their catalogue.

Any help would be great, thanks guys

Emma

Japanese, most likely Sanyu or Hineri Iwatsu

Wow your on a roll.. thank you