Help with Pilot watch case hallmarks

I’d love some help with untangling the marks on this watch case please to find out about it.
It’s stamped PILOT on the movement- is that a brand or a model?. A google search just brings up lots of Pilots watches.
There is one indistinguishable mark to the left of the 925. One I don’t recognise to the right.
67423
Several hand engraved markings including
M2867y
R2926y
299N
at/

Any help appreciated
Thankyou

 

British marks for import goods. The one on the right is a London import mark - first used in 1904. The letter i below all that is for 1924 assay. The round mark is from the country of origin.

 

That round mark to the left of the 925 (which KSW cannot read) is a mystery to me as well. The second pic looks like it might be some kind of bird, but isn't really clear.

 

Quite possible. Definitely not anything official.

 

Thankyou! I was guesstimating 20’s so at least I’m getting closer!.
Good to know that London import mark as I’ve seen it on other pieces.
Any experts on watch brands to tag?
I’ve been on one of those watch forums previously but they are all a bit scary for amateurs like me. All comparing how big their watches are

 

George Stockwell as the sponsor for import, if it helps.

 

Thankyou

 

Run of the mill ladies 15 jewel lever, as stated, from the mid 20s. 'Pilot' would just an arbitary brand name and of no significance.
You probably now know as much as anyone could ever know.

 

To state the obvious, it does say 'Swiss made'. Is the face what is called 'engine turned'?

 

Yes, it is engine turned.