My BB is the 31st edition.
As to Ruger's web site, I can only suggest sending them an e-mail and asking about those contract models.
The BB also says they were for "training purposes" but I doubt that. The US has not, since the 1930's, used small bore rifles or pistols for training; regular training is done with the service rifle or pistol. Those Ruger pistols, like the High Standard and Colt pistols before them, were for use by military pistol teams in normal competition, not for training recruits.
Jim