Older RCBS scales were made by Ohaus in New Jersey. A few years ago RCBS moved production of them to China and QC was so bad the reputation was ruined and they ditched the old models and came up with new ones.
If I had to pick one, it would be an old scale and I really like the 10-10.
Also the Chinese made scales used the same casting (so it still had Ohaus made in NJ cast into it on the bottom but there was a little sticker beside that that read "made in China" it also said made in China on the box.