You are correct about Hitachi building that radio. There is a little symbol on the pcb that proves it.Looks like something Hitachi might have churned out. Sams claims they have a photocopy of the OEM service manual:
https://www.samswebsite.com/en/photofact/search/index/model/934_38261800
Just 25 bucks to find out if it's the right one or not, since they don't offer any sort of preview I can find.
You are correct about Hitachi building that radio. There is a little symbol on the pcb that proves it.
I'll take it any way I can, Lucky is less work. The FCC used to keep documentation for all of the radios that were submitted for approval on part 95 citizen band service. Have you checked those numbers?