Seiko-Moeris

[Rasputin]

It’s my understanding this Japanese Imperial Navy Seiko utilized a Moeris movement modified by Seiko, namely the Seiko-Moeris 10 ligne. Unfortunately attempting to use a stem designed for a standard Moeris 10.5 ligne was unsuccessful. Anyone have insight as to which Moeris caliber uses a compatible stem?

 

[Scarecrow Boat]

I wonder if @Seiji may be able to help with this?

 

[Rasputin]

Scarecrow Boat

I wonder if @Seiji may be able to help with this?

Unfortunately @Seiji wasn't able to. Anyone who has familiarity with these?