On Feb. 22, police say the man pictured above and at least four to five others entered the Bernie Robbins Fine Jewelry store on the 500 block of Lancaster Avenue.
Upon entering the store, the suspects smashed several cases and removed an undetermined amount of jewelry.
Authorities say all the suspects appeared to be wearing a covering over their faces expect for one.
The unmasked suspect is described as a light-skinned black male, with very short hair and a thin build.
Bernie Robbins Jewelers is now offering a $10,000 reward for information leading to the arrest and conviction of the bandits.
Anyone with information is asked to contact Radnor Police at 610-668-0503.