My Grandfather's Die Grinder

[terry_g]

My Dad gave me this die grinder years ago. It belonged to my grandfather.
He was a wood carver and made some amazing pieces. He probably put a lot of hours on this grinder.
I plugged it in and it runs quiet and smoothly. It has about 1/8" end play on the chuck.
It says on the body Sears Roebuck 15000 RPM.
Could anyone here help date this tool or have an idea what the empty space in the case was for?

Thanks!
Terry

 

[lazyLathe]

Hi Terry,

Did you manage to find any other markings on the die grinder?
All these small details will help us to identify it.

Andrew