Singer 12 Sewing Machine

My latest purchase is a birthday present for a family member similarly interested in sewing machines.  I won this machine on ebay (my first foray into the world of bidding) for the sum of $70 but only paid $60 as I had an ebay voucher.  I did not know for certain what the machine was when I bid on it but trusted my memory and instinct that it was a 12 and I was correct.  The listing also said that it was missing its shuttle, which it isn't, I was ever so pleased when I discovered that.
I have limited time to look at it as I have to wait until its intended recipient is out for a while.  However, in the two brief looks at it that I've had I have ascertained that the belt guard is sheered on the front (I have no idea how that is possible without it being severely damaged in some other way.), it is completely seized and I can't get a single screw undone.  I am doing well!  It will now have to wait for another few weeks before I get an opportunity to investigate it again but here are some pictures to be going on with.

Belt guard showing broken section in front

Bobbin winder detached

Underneath