Coin of Ardashir I, Sasanian King , died 240-241 AD

The sphere and crescent are clearly visible on his crown. This was a symbol for a solar eclipse. The eclipse of 240 AD may have influenced his decision to invade Roman Carrhae. His son Shapur I did not have any eclipse symbolism on his coins. That may be due the defeat that Shapur I endured at the battle of Rhesaina in 243 AD. Photo CNG auctions