I think that all of these "unknown" pedals were made 1988. For the DS-1 serial numbers I've collected there's a big gap through 1988 where I haven't seen any. I suspect that's where these pedals come in.
The DS-1 page (and 14 other pages) has already been re-written. It's just not been published yet. I'm editing pages every day now and will publish when all the compact pedal pages has been reviewed. My goal is to remove all the pocket dictionary quotes and replace it with original text.