37 x 57R M 15 HE projectile

[ron3350]

I have an empty 37 x 57R HE projectile. (not the bounding type).
The pointed steel fuze at the top unscrews but I cannot easily move the section above the body.
Is it a normal right-hand thread like the fuze top? I have not tried left-hand thread yet so hope somebody has one to check if right-hand thread.
Shell has no powder or explosive inside.

 

[Nabob]

Same as the top part. You need to turn it counterclockwise to unscrew.

 

[ron3350]

All unscrewed and rusty threads cleaned and greased. Thanks Nabob.

 

[ron3350]

All unscrewed and rusty threads cleaned and greased. Thanks Nabob.

Here is the photo of the Skoda HE projectile for the 37 x 58R mountain gun.
Projectile is stamped: 1917 SW monogram ( for Skoda Werke) - 6 1/2. Any ideas about the 6 1/2 ?
Note the brown paper gasket? under the fuze. All had been inerted before I got them both.