The first machines that came out were transverse shuttles, they had long bobbins and bobbin cases that looked rather like bullets. The bobbin moved back and forth in a straight line, unlike the round oscillating shuttles we get today. Next came the vibrating shuttles, these looked very similar but moved on a curved axes and were produced up to about the 1930's (in the UK anyway).
I absolutely adore my beloved old Vickers vibrating shuttle sewing machine. It's British made, dates back to the 1930's and is still going strong today. I picked it up at a charity sale a few years ago...the best £5.00 I've ever spent! I don't mind that a screw is missing from part of the handle, a safety pin holds it together. It only does straight stitch but that's good enough and I make all my wrap dresses and aprons on it. No matter what fabric I put through, it never lets me down, a proper solid machine!