Mark Antony appears on the other side of the coin that depicts Cleopatra. The large coin on the right is a decadrachm of Syracuse. It's widely considered to be one of the most beautiful coins ever struck.

The edge of the gold twopence. It's slightly thinner than the circulating copper version.

More die cracks can be seen on the reverse.

The small die cracks on the coin indicate that it was struck from old dies sometime after 1797.

Close up of the coin weights in their recesses and the balance scales. I’m assuming the string isn’t original? The small lid in the top right corner opens to reveal a bunch of smaller weights. These will have been used to test how much a coin deviated from its correct weight.

A print pasted to the underside of the lid depicts various coin weights and their corresponding coins’ values in Dutch(?) currency. It also shows two merchants and a skeleton, perhaps a depiction of Death striking down a dishonest merchant?

The reverse depicts the arms of these four kingdoms and a Latin inscription that translates to: 'Let God arise and let His enemies be scattered'. This inscription had appeared on many earlier Scottish coins, including those of James III and Mary Queen of Scots.

The coin's full Latin inscription translates to: ‘George, by the Grace of God, King of Great Britain, France and Ireland, Defender of the Faith, Duke of Brunswick and Luneburg, Arch-Treasurer and Prince Elector of the Holy Roman Empire’.

The reverses:

It weighs just over a gram. It’s about the same diameter as a modern 1p coin but much thinner.

Obverse at a different angle

The reverse

It's common for the period. You often see later 17th century-18th century British monarchs depicted in the same style on statues, engravings etc.

Here's gold £5 coins of George III (1820), George IV (1826) & William IV (1831) that also show the alternating portrait tradition.

From top to bottom, left to right: a halfcrown of Charles II, James VII/II, William II/III & Mary II, William II/III alone, Anne, George I, George II, George III, George IV, William IV, Victoria, Edward VII, George V, George VI & Elizabeth II. All are silver except for the last.

The 9th Scottish coinage alongside James's 2nd English coinage, both of which were authorised in 1604 & formed part of the Anglo-Scottish monetary union. The two smallest silver coins would've circulated as a halfpenny Sterling in England and as sixpence Scots in Scotland.