1782? 1822? Help with English teaspoon

I’m going with London, 1782 Thomas Northcote, and making the assumption that the obscured marks are post assay marks for obscure reasons. The other possibility is it’s 1822 and one of the obscure marks is a duty mark and the other is an uncrowned leopard but close examination doesn’t suggest as much, and the order is weird. As well the verso monogram looks more 1782 than 1822. Many thanks for having a look and offering guidance. 12.5cm and 15gr.

I am thinking pseudo British marks, possibly Chinese or Cape marks.

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The oval shape around the lion passant is something which is seen in the earlier date cycle. I have no doubt that this is 1782 and Thomas Northcote. The 2 partially obscured marks are a bit of a mystery though; neither one looks like it could be a crowned leopard’s head and in any case this is often missing on smaller items of the period.

I just thought this duty mark didn’t look right.