This Bultaco vintage part is a Magneto Side Case with Clutch Thrust Lever that is compatible with the OE/OEM Part Numbers 42.20-005 & 10.14-024.

It is suitable for placement on the left side of a motorcycle. This item is being sold as 'For parts or not working' with an emphasis on its compatibility with the aforementioned part numbers and placement on a vehicle. 

So, if you are looking for a vintage Bultaco Magneto Side Case with Clutch Thrust Lever that fits the above-mentioned specifications, this is the perfect item for you.