Anthony,
The version numbers shown in the documents that I wrote are of my own creation. Atlas did not mark anything printed before 1955 in any way that identifies what it is. From 1955 on, you have the year and edition number. Prior to that, you just have to know what questions to ask, and ask them. The average eBay seller of a MOLO wouldn't recognize a lathe if it fell on him. As I tried to explain earlier, If the edition that you need is one of those identified only by Copyright 1937, odds are exactly 100% that the seller is clueless. You will have to ask the right questions and have a cooperative seller (most will be) in order to find the one you need. There is one on eBay at the moment that is for the early Craftsman 12". I have questions in on a second one.
Taking the advice from wa5cab, I am patiently searching local second hand book stores for a MOLO. Who knows when one might show up. I must confess the act of being patient is tough but I have so much to learn that taking baby steps will most likely be beneficial.
If you don't turn up anything locally, set up a search on eBay for Manual of Lathe Operations 1937. Then be prepared to send a question each time one turns up asking what is in Part 7 - Threading. The second current possibility on eBay turned out to be one of the 37V2/3's (nothing in Part 7). The seller pulled the ad and is looking to see whether or not they have the loose supplement before re-listing it.
Anthony,
My understanding is that someone bought Jacobs and closed the US manufacturing plants. I wouldn't buy a new Jacobs chuck. You can find good used ones on eBay if you are patient. I've bought several.