Looks like a nice find. Judging from the fact that the tailstock is gray, a PO must have repainted it but forgot to do the tailstock. If you bought it from an individual and not a shop going out of business, it may not have a lot of hours on it. I see a Quick Change Tool Post (incorrectly installed unless it was set up for some special operation - normally, the compound should be set to 30 degrees from straight across, not 90.
Generally, there are three or four typical parts sources. Clausing still stocks a fair number of new parts for the Atlas lathes. However, unless you've recently had a vehicle or a major appliance repaired, you may be in for a bit of sticker shock at the cost of parts. When calling Clausing, you are probably better off giving them the equivalent Atlas model number than the Craftsman one. The only difference between the Atlas and the Craftsman badged units is the badge. It won't affect the price but the current sales people aren't as familiar with the Atlas machines as their predecessor Jolene was. The Atlas model number would be 3991. Two other parts sources are eBay and Craig's List. Another is Forums like this one and the A-C list now on Groups.io (formerly on Yahoo). And finally, commercially made minor parts at places like McMaster. However, although many people are too shortsighted to understand why, we have a vested interest in keeping Clausing around for the parts that you can't buy at your local Five & Dime.
Dating the 12" Commercial lathes is made more iffy by the fact that Timken stopped engraving dates on the spindle bearings in 1952 or 53. So absent an original invoice, it's a best guess. The group of models that yours is one of were made from mid 1957 to to mid 1967, and an estimated 10,000 of the Craftsman versions were made. Which assuming that the same number were made in each year, puts yours at February, 1962. Fortunately, the exact model number isn't a factor, as they all drew serial numbers from a common pool. The actual date could have been +/- a year from then.
