I hate to say it, but it looks to me like a parts gun. I used to buy guns from Simpson 20+ years ago, but in recent years virtually all the guns on their site seem to have something wrong with them yet the prices are astronomical. Make sure you look the pistol over real good when you receive it and verify all the wear patterns match. The Parkerized barrel is already a no-no and the mismatched finish on all the parts indicates to me that some parts swapping was done. Don't hesitate to return it to them if it doesn't look better in person than these pictures indicate. There are plenty of good, all-correct Remington Rands and Ithacas out there for around $1800 or so if you're patient.
Years ago they had Delbert. He was the 45 guy for years. Probably retired about 2000. He knew M1911s and A1s and tried to correctly represent them. The dad and son are not big on these pistols.
I too doubt that they put it together. They are too busy to construct most guns, especially under 10K. They probably got it this way and are just flipping it. That said, hard to say for sure. Plus, it is not right as I said before. Looks like a $900 gun so far IMO.
OK after some more looking I found out that my pistol was sold on February 22 2015 at the Rock Island gun auction with a 22lr slide on it. So it is a piece together gun. Oh well live and learn I guess. Thanks for all the help and insight.
I thought on Ithaca 1911A1s the M1911A1 model legend on the right side of the slide was further forward of the slide release hole than is shown. The placement of the model legend looks more like in the position of a Rem Rand to me or am I mistaken.