HP M51630-BG1 top cover with keyboard is a notebook replacement part that combines the keyboard and its surrounding top cover in one assembly. It is listed as an HP notebook spare part.
This is the backlit, no-fingerprint-reader version. The -BG1 variant is for Switzerland, and the keyboard layout is identified as Swiss, making the regional layout clear for replacement planning.
The listing specifies one piece in the package. The item is intended to replace the corresponding top cover and keyboard assembly; the cited information does not specify compatible notebook models.