Watch List notes:

The Roman Empire

Tranquillina, third wife of Gordian III. Antoninianus or double-denarius 241, AR 3.79 g. SABINA TRANQVILLINA AVG Diademed and draped bust r., on crescent. Rev. CONCORDIA AVGG Concordia seated l., holding patera and double cornucopiae. C 1. RIC Gordian 249.
Very rare. An appealing portrait and a lovely light iridescent tone, extremely fine

Ex Gorny & Mosch 114, 2002, 385 and NAC 87, 2015, 321 sales.
The coins of Tranquillina are inexplicably rare. They include the full range of denominations then being struck for her husband in silver and bronze, lacking only gold coins or medallions. Though Tranquillinas series shows every sign of being the first output of a substantial coinage, it must have ceased after the initial issue.Tranquillina was the daughter of Timesitheus, whom Gordian III made commander of his praetorian guards in 241; his appointment must have occurred contemporarily, or just prior, to the royal wedding in May 241. Celebrations were probably brief as Gordian, Timesitheus and Tranquillina soon marched east at the head of an army to answer the invasion of Roman Syria by the Persian king Shapur.
To have arranged his own high appointment and the marriage of his daughter to the emperor, we may be sure Timesitheus held sway over the timid boy-emperor. It remains a mystery why Tranquillinas coinage ended as soon as it began, for Timesitheus remained praetorian prefect until his death two years later, and Gordian remained married to Tranquillina for the remaining three years of his own life.