Watch case hallmark help?

Someone posted photos of a watch on FB, and I'm trying to see if I can decipher the hallmarks. I see the British mark for sterling, and I think I'm seeing the mark for Birmingham with a date letter stamp for 1815, but the maker's stamp is confusing me. It looks like C H, for Charles Harris, in Coventry. That mark, according to https://www.silvermakersmarks.co.uk/Makers/Birmingham-CE-CL.html#CG
wasn't registered until 1893. What am I misinterpreting?

 

Birmingham date letters for 1893 was a t also....

 

Could the lack of Sovereigns head duty mark mean it was not made for export?

 

Duty mark has nothing to do with export, so no.

 

Phil only lists marks he has seen, so it's possible there is another maker with CH. But I am leaning toward 1893 because of the lack of sovereign's head. Perhaps he will see this query and comment. @silvermakersmarks

 

This is 1893 and Charles Harris. However it's not because of a lack of duty mark as duty on watch cases was removed in 1798. This form of hallmark with Birmingham anchor and date letter both in flat-topped shields with bevelled corners was introduced during the 1875-1899 date letter cycle.

Phil

 

Thank you so much, Phil!

 

Yes, thank you all.