Yeah, I do, too. I'm seeing a few of these on GunBroker. They have a different model #, though. Mine has the correct model # for what it should be..."O1911C-EC"...just like the seller's online photos. There are a few on GB that are showing a different model #..."O1911C-Z". None of them have sights installed from the Colt factory like mine does, but Colt did include them with the gun. Some guys are saying these unmarked guns are meant for engraving or customizations...sort of a base gun. I don't know. All of the prices are pretty much the same so this is definitely not some one-off that'll be a collector item.
It's just different. I've never seen one before.