This is more of a repair than a restoration. I found this Speedrill automatic driver at an estate sale last year still in its box. Unfortunately, the plastic handle had disintegrated. Otherwise, it is in excellent condition. It even still has all of the bits. Made in France and all of the writing on the box is in French. Speedrill appears to to still be in business making drilling equipment. I have not yet found any other information on it.
I thought about trying to 3D print a new handle but ultimately decided to just turn a new handle. I did not want to risk taking it apart. I can imagine the spring inside being difficult to get back in if I mess up so I had to make the handle in 2 halves.
I didn't like the way the walnut looked with the red end piece that was still in good condition so I decided to use a red dyed shellac to make it blend better. I put a couple of coats of rattle can lacquer over the dyed shellac. I will probably use an abrasive pad to tone down the sheen a bit.
--Nathan, TX. Hire the lazy man. He may not do as much work but that's because he will find a better way.