Help Determining Date on Gold Hallmark.

by Oliver
(Edinburgh, UK)

Hello,

I need help finding the date of gold from the back of an old watch.

The hallmark is:

9 375 (Anchor) (X)

I know it's 9ct gold and is from Birmingham, but can't find the accurate date through the 'X,' from a website, it said that it means it's from 1997, but know that it's much older than that. (I was thinking more 1930s)

Can you help me out?

Thanks!

Oliver