He is described as white man about 5'8" tall and weighing 215 pounds.
Investigators say he is the man seen on surveillance video early on Sunday, October 18th holding up the store at Ridge and Butler Pikes in Conshocken.
Police say Jaskolski entered the store and asked the clerk where the bathroom was located. He then walked behind the counter, said he had a gun and demanded money.
The female clerk handed the man cash, but he allegedly also took the money in the tip container.
Similar robberies happened at the store on West Baltimore Pike in Media on October 12th and the store on E. MacDade Blvd. in Folsom on October 16th.
Anyone with information is urged to contact police at 610-279-1900.
You can get the latest crime statistics from the Philadelphia Police by CLICKING HERE for the force's crime data mapping site.
