Kearney and Trecker 307 s-12 - Practical Machinist
Jul 03, 2016· Hi, I am looking at a new to me mill. It is a 307 s-12 and it has the power overarm with a double swivel head on it. It will be a lot more machine than my 2hl I currently have. I'm curious of the age. The serial number is 29-9177. I checked it out under power and everything works great on the power ram and main horizontal column.