I experimented with the .357 and .38 Special versions of those years ago. Both behaved similarly to FMJ 9mm on auto sheet metal; the .357 only more so. Only the tip of the bullets are jacketed; a guilding metal cap. The bearing surfaces that contact the bore are lubricated lead just like 158 gr RNL.
There are 2 W-W versions in .38 Special. One is conical shaped just like the OP's photos. The other has a curved ogive similar to a FMJ .30 military ball; but much shorter. Both are listed as H.V., similar to what later became +P.
I also had some .38 Special standard velocity 'Metal Capped' rounds. Those had lead 158gr bullets that had a round nose, guilding metal cap covering the bullet noses. They also had lubricated lead bearing surfaces.
I believe all of these rounds were designed to increase auto body penetration and nothing more. Laws regulating AP handgun ammo do not apply to these designs because they do not have hard metal cores. They have solid lead cores.