![Image](https://i.imgur.com/qGXwTEj.jpg)
![Image](https://i.imgur.com/eOGR7su.jpg)
![Image](https://i.imgur.com/yWjG47f.jpg)
These images are of the marks on the back of a pocket watch that I am researching. It was clearly assayed in Birmingham and does not have a Duty mark, which means it is after 1890. The date letter'i' suggests 1908 as this was the only year the letter i was used after 1890. (my understanding is that later years skipped the i and went staight from h to j) However the shape of the shield doesn't seem to fit that used 1908.
Also the maker is SW. The only suggestions I have seen are Samuel Whitford II and Samuel Wheatley.
Can anyone confirm or offer other ideas?