Badging is the name for a name on a machine that was built by another.
Loading pics to this forum isn't easy and since the change a few days ago it is harder. They need to be pretty small.Thumbnail sized.
I was wondering what you were considering to be a 156. Not sure I've seen one of those. Yes many more sources for 66,99 and 15s than a 27 Since they are that cheap I'd recommend you get all three ( what else would I say?) YOu can learn on the 66 first and then with your newfound abilities take on the 27 and the Winthrop. keep water away from them and oil everything that moves, or should.. and sewing machine oil. 3 in 1 will lock these puppies up.
Have fun with your new addiction.