At the same time, a pair of "Clockers", the westbound "Keystone" and eastbound "Big Apple", were extended to Harrisburg on weekends. They ran within an hour of the "Valley Forge" weekday schedule; however, they ran to 30th Street and Suburban stations rather than only serving North Philadelphia. The "Keystone" was renamed "Susquehanna" on October 25, 1981. The "Big Apple" and "Susquehanna" dropped the Suburban Station stop a year later, but continued to serve 30th Street. On October 30, 1983, the "Pennsylvanian" was extended to New York City, eliminating the transfer at Philadelphia (although it continued to stop at 30th Street). On January 12, 1986, the eastbound "Valley Forge" began serving 30th Street (as the westbound had for six years); this allowed it to effectively replace a canceled "Keystone Service" train (#600, the first morning eastbound) to serve commuters.