sulla80
Coins of the Bosporan Kingdom
This coin is called a "sestertius" by modern numismatists, however it is lighter than the contemporary issues from Rome. The MH on the back is the Greek number 48 and is the mark of value (48 units of bronze).

Sauromates I, AD 93/4-123/4, Æ 48 Units, struck AD 117/8-123
Obv: diademed and draped bust right
Rev: MH (mark of value - 48) within wreath
Tiberius Julius Sauromates I Philocaesar Philoromaios Eusebes aka Sauromates I, lover of Caesar, lover of Rome, and most Pius, was descended from Mark Antony, his great-great-great-great-great-grandfather. For the family tree see: Romans & Crocodiles. Sauromates I had no shortage of royal relatives. He was a descendant of Greek Macedonian Kings (all of whom served under King Alexander the Great)
Antigonus I Monophthalmus
Seleucus I Nicator
Antipater (regent)
and Mithridates VI of Pontus + Laodice (his wife and sister) and Bosporan King Asander.
His name comes from the name of a Sarmartian tribe, the Sauromatae. The Scythians in Crimea were a primary enemy during the reign of Sauromates.
This coin is an unusual coin from the son of Sauromates I. 48 unit pieces decline to about 10grams during the reign of Kotys II, and this coin is heavier than anything that can be found in the ACSearch listings of this coin. There are only 9 examples that I find of this coin in ACSearch, and teh second heaviest is 12.82 (nearly 2 grams lighter than this coin).

Roman Provincial, Kingdom of Bosporus, Kotys II, 123 - 132, 27mm, 14.66g
Obv: ΒΑΣΙΛΕΩΣ ΚΟΤΥΟΣ, bust of Kotys II to the right, trident in front of it.
Rev: M-H, Nike with palm tree and wreath
Ref: MacDonald, Bosphorus 434/2, brown-green patina, VF
Provenance: Former inventory of the Munich coin dealer Karl Kress before 1986.
This next coin is from over 100 years later. I didn't realize that this was an electrum coin when I purchased it on EBay years ago, I assumed it was a silver stater. While there is a slight gold color on the surface it is clearly not very pure gold. This 7.2g, 20.3mm stater is the only electrum coin I have from the Kingdom of Bosporus

KINGS of BOSPORUS, Rhescuporis IV, with Philip I circa AD 242/3-276/7, Billion Stater (20.3mm, 7.2 g).
Date: Bosporan Era 541 (244/245)
Obv: BΛCIΛEωC ΠHCKOΠoRIK Diademed and draped bust of Rheskouporis IV right
Rev: Laureate and draped bust of Philip I right; club before, AMΦ (date) below.
Ref: MacDonald 602; Anokhin 691; Stanislavskii 640