Schering CubeAn official Rubik's Promotional cube for Schering. Probably the manufacturer of a drug called Betaferon.
Schreiner MediPharmCube advertising for company which produces pharmaceutical and medical devices.
Scrabble CubeA 3x3x3 stickered as if blocks of the famous name-giving game were glued on.
Sea Turtle CubeCustom sticker variant showing entangled sea turtles. A design comparable to the works of MC Escher.
Seafirst Bank CubeDisplays the following words: SEAFIRST, IM&TS, Investment Management, Trust Services, 800-228-7180.
Siefert SurfacesThis cube is a Mathematical Art cube, showing six Siefert Surfaces.
SiemensThis 3x3x3 cube advertises Siemens microcontroller technology.