Found Silver & Tantalum

That's what I would put it at, although "riser" boards are usually connected via a slot of their own to a larger board. IE a PCI riser board would extend more pci slots out of one slot parallel to the motherboard. Your board is what I would call a backplane. I could be wrong, it's late and I'm tired. Palletizing TVs isn't a late night activity.

This a picture of a nice populated board, that came out of a keyboard. Made in England in 1988, the board is called a keyboard interface. Has fourteen epoxy "drop" type capacitors, that I will not be removing. There is ten non soldered IC's that I will remove, have already removed one of them (had gold plated top and pins). This board has gold plated pins on all of the connections and jumpers as well.