Are delta faucets made in the us?

I just spoke with a representative from Delta Faucet. I am a Kitchen Designer & I had a customer who wanted a faucet made in USA. The very professional Customer Service rep from Delta Faucet told me that some faucets were made in USA & others weren't. I gave her two model numbers to check if they were made in the USA. After being placed on hold for about 5 minutes and receiving a warm apology after the rep came back on the line, I was told that she couldn't give me that information, She informed me that the manufacturing origin stamp is on the box. I just needed to look on the box where I was purchasing the faucet to see where it was made. Apparently, the information is only on the box & Customer Service doesn't have the information. This kind of throws a wrench into purchasing a special order item, so I'm off to call the warehouse & find out if the faucets I chose are indeed made in the USA.