British hail marks and makers mark help please

[RiiZzLe]

Hello, I think this reads;

Made of sterling
Made in London (1300-Present)
In the year 1762

Having no import or duty marks makes sense, right?
Also, I am finding it very difficult to uncover who's maker mark that would be? Could I get some help?

[SteveDWollongong]

Your interpretation of the marks is correct. London 1762. Makers mark of incuse I pellet R For James Richards, case maker. Mark first entered January 1762.

Cheers,
Steve

[RiiZzLe]

Thanks Steve, I appreciate the help. Would you be able to tell me about the gold watch mechanics? I’m confused to why it read M. Dexter (if I’m reading that right)

[silvermakersmarks]

Dexter was the watchmaker. Watchmakers did not, in general, make their own watch cases but bought them in from specialist case makers.

Phil