Adi,
Welcome to the forum.
To the best of my knowledge, the Epiphone G-310 has always been made at Samick's Indonesian factory (at least since 1992 when that factory opened.)
Regarding value...well, it's not worth very much in terms of cash. But they are quite nice guitars, so its value is to you, the player, as an instrument you can use. In the United Kingdom you can buy a new one of these for around £140 (about 200 Euros).
To post photos here, set up a photobucket account - http://photobucket.com/ - then use the image tool on the toolbar for this forum (looks like 2 mountains and the sun) to copy the link to your photo here.