Hi Craig, I moved the drawing into your original post here. Thanks for that. OK. You are reading the marks upside down. It isn't HM but WH - the marks are Chinese export marks. The maker's mark is: Wang Hing & Co Hong Kong late 19th century /early 20th century
Hi Craig -how very interesting. Could you please upload a photo of the actual marks in a follow-up submission. We will need to see a photo of the actual marks.