It would help if you showed a bigger picture of the writing of the label side so that it is readable
at a guess I would say a laptop(I'm an IT technician), pretty standard values nowadays for a lot of brands, Toshiba, Dell, HP.
Just as well you didn't turn it on the light probably would have blown. 19V is well over 16.8V. The other thing to check for when hunting for a suitable adapter is the polarity of the plug. Most standard is centre tap/pole positive.