This is my oldest VIC-20 - or rather the VIC-20 with the lowest serial number. I don't really know how to date the VIC-20s just yet, but as soon as I do, I will put something up with the details.
VIC-20s were made all over the world, and its country of origin is usually printed on the bottom, on the sticker, and often also listed on the Serial Number (which is also printed on the sticker, so not a lot of help should the sticker be missing.
This particular VIC-20 was made in West Germany - and the Serial No: WG B 194673 - tells us that - the WG stands for West Germany.
This is one of the 9VAC computers, with the single two pin power plug. The sticker on the bottom saying 9VAC 25W.