Hallmark on a Cruet Set

My husband and I bought this cruet set in Princeton NJ, USA. I am wondering if anyone might be able to tell us something about the hallmark. I would love to know about the age, maker, or what the metal is.

Thank you
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On the face of it this is a London, 1824 hallmark. However it doesn’t look quite right to me; in particular the duty mark (far left) may not be quite right. Can you post a clear, in-focus picture please. It would also be useful to see the complete item/s and any other marks - there should also be a maker’s mark with any hallmark.