The ST75F-P is following the new design size we're starting to see a lot of modular supplies taking these days. Instead of having extra length for the modular plugs, like modular supplies were always known for, this new breed of modular power supply is hardly any longer than a hardwired one. The 160mm depth is actually the exact same size as the hard wired power supply I am using in my main system right now.
The left side of the casing houses the usual load range chart sticker, but Silverstone has also chosen to proudly display an 80PLUS Silver sticker here as well as the ROHS logo.
The top has the Silverstone logo stamped in it - this is seen on almost all of their power supply models. You can catch a glimpse of this on the photo above.