It's one of these good old standard zig-zag machines build in Japan in the early 60s. Don't know exactly who build it. Two or three Japanese manufacturers incl. Brother are the usual suspects. There are still a lot of machines on the market (also in Germany) which look similar and have the same functionality.
What I see from left to right:
- Standard top thread tension unit (standard setup is 4-5)
- Needle position selector (left, middle, right - standard is middle)
- Stitch width selector (0 = straight stitch, 1 - 5 zig-zag stitch width)
- Stitch length selector (R = reverse stitching, F = forward stitching, standard is F and 3 as stitch length)
- feed dog immersion or drop feed buttons
- bobbin winder unit (a fitting bobbin winder rubber is missing!)
Don't think that you need a manual. I'm almost sure that this machine works very well if you clean and oil it properly. That's all you need.
If you need more information please show more detailed pictures (especially from your bobbin case and bottom of this machine) or ask again.
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