The OSP was designed for the Olympic 25 m Rapid Fire Pistol event and became the perennial winner of the event.
The pistol features a Morini grip, which places the bore at a lower level to reduce recoil.
The barrel is weighted and ported, and felt recoil is virtually none.
[1] The pistol was effectively rendered obsolete by 2005 ISSF rule changes to the 25 m Rapid Fire Pistol which standardised the rules to that of the 25 m Standard Pistol, which precludes the use of the .22 Short cartridge, wrap-around grips and very light trigger pulls (weight required to pull/activate trigger).
The new model was the Walther SSP which effectively replaced the OSP.