37mm Hotchkiss

I got two similar 37mms today, with a slight difference on the base. Neither has any markings anywhere that I can see, but one looks as though something was cut away where a headstamp might have been. Can anyone identify the origin and any significance of these two rounds?
Thanks.


Any help here?

Jon,

While not a lot of info to be seen here, these items are listed on Municion as unmarked and the one where the case head is shown as likely being a U.S. product. The driving band on the plated cased round looks to be a bit different than yours.

municion.org/40mm/Res2G.jpg
municion.org/40mm/Sergio.jpg

Dave

Edited for clarity.