Old revolver cartridge?

Hi forum,
I have this little old revolver RF cartridge,
Bullet Ø is 8,7 mm (a bit too little for a .38?)
Case lenght is 19,8 mm (exactly as .38 S&W)
COL is 29,9 mm
Rim Ø is 10,2 mm
HS looks like RWS, but can anyone help me ID the caliber?RF_RWSb RF_RWSa

You have what is known as the .350-9 mm German RF, mainly used in revolvers according to RWS catalogs. Your example is a RWS product.

Great Vidar,
thank you! .350 German RF…