Type 38 no mum different crest?

[cpc]

A friend picked up a type 38 rifle that has no mum/number and a different crest that I am unfamiliar with ( I don’t collect Japanese rifles). It appears to be a Nagoya symbol with an H. I have read that some early training rifles and rifles made in China or maybe for export do not have mums, just wondering if anyone is familiar with this crest? Regards