Unknown marks on Japanese or Chinese brooch

[Ziggy]

I would be very happy if anyone could tell me more about this brooch.
I've owned it for many years but never figured out where it came from or who made it.
The size is 31 mm (across)
Thanks!

[wei]

the words on left side mean pure silver
I think its Japanese

[Ziggy]

Thank you Wei. So I guess the mark on the right would be the silversmith's?
Do you have any idea of the age?

the words on left side mean pure silver
I think its Japanese