Pocket Watch case maker and date help please?

[Lhendy]

Hello,
This was my grandfathers pear cased pocket watch and I’m struggling to find the makers name. Can anyone please help?
I thought it might have been James Ariell but I thought the date stamp was 1769 and didn’t know if that would still fit?

The watch movement is engraved Ja White, London if that helps?

Thank you

[silvermakersmarks]

1769 looks right to me. J·A would therefore be Joseph Allen who registered his mark 20 May 1761.

Phil

[Lhendy]

Thank you so much, that makes far more sense : )