'Knife Money', China, 1st millennium BCE

Coin of the Emperor Probus, Roman Empire, ~280 AD

Gold and copper coins of the Tang Dynasty, China, between 618 AD – 907 AD

Casting mold for coins, China, 1st century AD?

'Spade Currency', China, 475 - 221 BCE

Copper coins from Masada, rebel-held fortress in Iudea, Roman Empire, 66-73 AD

After 5 years of searching, I finally have him: Caligula. Fourré denarius, Lugdunum (Lyon) mint, 40CE. Reverse: "SPQR - Ob Cives Servatos", "PP"

Gold coin (Aureus) of the Emperor Hadrian, Roman Empire, 118 AD

Gold coin ('hyperpyron'), Constantinople (now Istanbul), Byzantine Empire, 1081-1118 AD

Silver coins of (left) Gordian III, Roman Emperor in 238-244 AD, and (right) Postumus, founder of a split-away Gallic Empire in 260 AD, France

Gold dinar, Umayyad Caliphate, found in modern-day Lebanon, 694 AD-695 AD

Umayyad Gold Dinar, 723 AD

Gold Umayyad coin, probably minted in Damascus, 691 AD-692 AD

Four well-preserved Roman coins, copper alloy, 1st century BCE/AD

Norse silver coin turned into a pendant, Sweden, 800 AD-1100 AD

Selection of Hellenic coins, _6th-2nd century BCE

Corroded silver coin with a trident, Ukraine, 1019 AD

Bronze sestertius of the Roman Emperor Vespasian, 71 AD

Indonesian Piloncito coin, 8th-10th century AD

Greek coin from Knossos, Crete, 4th century BCE

Silver coins of the Golden Horde (or Russian vassals?), 14th-15th century AD

Silver coin of ancient Athens and modern Greek 1 Euro coin, 425-400 BCE

Aksumite gold coin, Ethiopia, 500-525 AD

Gold coin of the Kilwa Sultanate, Tanzania, 14th century AD

Pupienus antoninian, 238AD

My Maximinus Thrax denarius

A Licinius II follows with a naked Jupiter on the reverse ;)

Hoard of gold coins, Roman Britain, 2nd century AD

Billon coin of Roman Emperor Trebonianus Gallus, coin minted in Syria, 252-253 AD

Hephthalite (White Hun) coin with a swastika, Northern Pakistan, 5th or 6th century AD

One of my bronze coins of Maximimus II from 312 CE

Square Greco-Bactrian coin, around modern-day Afghanistan, 2nd century BCE

Brass coin of the Roman Emperor Vespasian, 71 or 72 AD

East African coin, Sultanate of Kilwa, Tanzania, 1331 AD

Square coin of Eucratides I, with bilingual inscriptions (Greek and Pali), Greco-Bactrian Kingdom, 171-145 BCE

Silver coin depicting voting in the Roman Republic, 113-112 BCE

Silver coin of Menander, Greek Buddhist monarch of the Punjab, 160-140 BCE

Gold coin of the Celtic Parisii, late 2nd century BCE

Lycian diobol struck under Mithrapata 390-370 BCE

Achaemenid Persian 'bent-bar' coin, Northern India

My smallest and my largest ancient Greek coins together

Very unique imitation gold dinar made in Anglo-Saxon England, 'Offa Rex' ('King Offa') inscribed in Latin on the reverse, 8th century AD

Silver Iranian coin turned into a pendant, found in Sweden, date of manufacture 931 AD-932 AD

Part of a hoard of square Mauryan silver coins from India, 3rd century BCE