I play the harp, and Corwen has mentioned the most important points, I'm just reiterating with a bit more detail.
The thing with Pakistani (China too these days?) harps is not that they are a bit cheaper and not as well made, but that they are some times literally unplayable. It is not snobbism that makes us warn beginners to stay away from them -- people put so much hope and dreams into a new instrument, and to end up with a wall decoration is just cruel.
That said, some of them are playable. When you have a chance to inspect the harp, and it has the outer characteristics of a Pakistan-made instrument (as Corwen described above):
Tune it (or have it tuned), and listen if any string has the tendency to drop down in pitch immediately after tuning -- this obviously shouldn't happen.
Check each string if it buzzes, play it soft, play it loud. Did it change pitch just from playing? (Shouldn't happen.)
Does it have sharpening levers? Check every one of them: does it actually sharpen the pitch by a semitone? Not roughly, but rather exactly a semitone? If you don't hear this, take someone with you who does. Does the string with the lever set still sound good? Does it buzz now?
Is any of the metal parts of the harp loose? They shouldn't move (other than the levers themselves of course, in their intended direction of movement). Any loose parts buzz or kill sound.
Is the harp still in tune? It really shouldn't need to be tuned more often than once a day if temperature / humidity don't change.
Inspect the wood. Cracks anywhere are bad. Some cracks in the soundboard might not be too bad, if they are parallel to the grain, and if the grain itself runs perpendicular to the strings. If in doubt, feel free to send pictures. (I would be careful about cracks in plywood too.)
If you really like to play the harp, it is possible to fall in love even with an unplayable instrument. Try to stay objective
19 strings isn't much, and here in Germany I think the only 19-string harps you can buy are Pakistanis, the local makers don't build them. BUT: I believe several american harp makers also build these small lap harps, and I've seen sheet music specifically arranged for them. So beware, but it is possible that it's just a decent small harp waiting for you.
If you have pictures, it's probably possible to identify the maker. Maybe your friend's acquaintance could send you some?