Roberto, I have some interesting news for you. My description above of the different types of no 2 light type machines was based on the manuals that I had available to me, and based on catalog 141 from 1939. I recently got a copy of catalog 142, from 1941. The machine you have is from that catalog, and appears to be yet another version of the mill which included table feeds that were shaft driven by the main 3 horse motor, and fast feeds which were driven by the ¾ horse motor. I didn’t mention this mill because I didn’t know about it. The catalog clearly states the main feed is from the shaft, and the fast travel is from the second motor.
How do I know this is your type? Look at your third picture. You can clearly see both the shaft feed case, and the fast travel motor. The earlier ones don’t have the motor, the later ones don’t have the shaft feed case.
I don’t have the manuals for this model, but I have the parts manual for the 1939 model which has only one motor and shaft driven table feeds. The 39 model has roughly similar controls. I also have the operation and parts manual for the 1943, 44? model in which all table feeds are by the second motor. The controls for the later model are significantly different. (I am not sure when the converted all table feeds to the second motor, could be 43 or 44) You really do want the operations manual for your machine.
It looks like Brown and Sharpe changed this mill a lot in the seven years from 1939 to 1946, as there are 4 versions of this same model that I know of in those years.
You might try these guys, it looks like this is the parts manual for your machine.
http://cgi.ebay.com/Brown-Sharpe-2-Milling-Machine-Parts-Manual_W0QQitemZ330097730022
Note it is listed as light type with power fast travel. You should call them first and find out if it is the same as your mill, and if they have the operations manual.
I did finally copy what I have and it is being sent to you. Hopefully it will help some. Good luck.