This sidewalk clock was built in 1892 by E. Howard Co., and has spent most of its time (so to speak) on this corner. Presently, the face on the City Hall side is 8 minutes off, so that needs to be fixed. It is called the Lovers' Clock because couples used to meet at it for dates. There are a few stories on the Web about it, including http://www.philly.com/philly/news/20160622_The_railroad_is_long_gone__but_Reading_clock_ticks_on.html --and-- http://articles.philly.com/1998-12-02/news/25720913_1_clock-reading-terminal-septa. The former was in the Philadelphia Inquirer on 6/25/16, at p. B4. The lovers' clock attribution has been traced to a 1922 Evening Bulletin article, and some sources have the apostrophe this way, lover's, which I think is wrong. I don't know how the Bulletin actually had it.
Hard Rock Cafe (corner with) , 12th and Market Streets , NE Corner (1131 Market St.), Philadelphia, Pennsylvania, 19107, United States