There is metal throughout the case which was a bit rusty. The handle D-rings, the hinges, the locks and the feet. I have decided not to take any of these things off, because I can't do it without further damaging the case, and aside from a little rust, it's all in good condition. With a little help from WD40, a wire brush, and some oil, the pieces are much improved. They aren't perfect but they have character.
Handle D-Ring - before
Handle D-ring - after
Locks - before
Locks - after
Underside of the D-rings - before
Underside of the D-rings - after
The actual handle base is stitched through the wood, it was attached with a chain stitch and cord. All of this was cleaned up below.
Stitching around the D-Ring.
I really have to hand it to Singer these were made very well.