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The verdigris may not show very well in the photo. Below is another "before" photo under different light. Work is in progress on coins with more obvious/stubborn verdigris. I will report back!

Definitely two different coins, a slightly higher 9, but not from what I see the wide date with the high 9

I don’t like using proprietary products because I don’t know what’s in them, and I believe VerdiCare is difficult to obtain in the UK anyway. After some research on what the British Museum used to use to treat bronze disease and verdigris on large objects, like cannon, I tried the technique for myself on this battered 1799 half-penny. For anyone interested, the treatment was 100 minutes at 90°C in a 2% w/w solution of sodium sesquicarbonate in chlorine-free water. Followed by a rinse in chlorine-free water to remove the chemical and then a rinse in acetone to remove the water. The heat is needed as the reaction is impossibly slow at room temperature.

Believe me, it was the same in the 90s after Spink took over, but some collectors still referred to it as 'Seaby'!

Hi, yes - it's the JH replacement (second) type.

Definitely different coins. A complaint is certainly in order, and negative feedback. I would point out to the vendor that the coin is still legally yours, and that it has unique features that make it identifiable in the future. However sadly legal action , even should the opportunity arise, would likely be prohibitively expensive. No harm in publicising the vendor if you don’t get redress. Jerry

James I Half Groat ..... ive been keeping away from the hammered pennies as Its tiring and needs a break for awhile.. I have others already identified of and fairly confidant that its ... weight 1 grm James I, Half Groat , Second Coinage 1621 - 1623 m.m. Thistle any comments welcome....🫡