23x115 Case Manufacturer ID

I have a brass 23x115 fired Case headstamped “H” (Cyrillic “N”) at 12 O’Clock, and the date “70” at 6 O’Clock. This headstamp is raised within the central indented circle as with 14.5x114mm headstamps. What country and arsenal does this case originate from? Thanks in advance for your help. See photo of headstamp below:

This case clearly is Soviet, although the manufacturer code “H” still remians myterious. It is one of the few codes that could not be identified yet…


Thanks, do you know anything about the 30x155B case in my other thread?