Yep!
It's on the back of my I-94 Departure Record. No scan available, but here's a description.
Under the Record of Changes Header
- One IO (the first one) wrote my Alien Nr
- then later at the second desk (behind baggage claims) another IO stamped a red ink stamp with the words "NYC 62, Employment Authorized, Date" and then wrote in the dates 12/30/07-3/29/08.