Help Identifying a "Blank: Luger?

[DutchLuger]

I collect Dutch Lugers and recently picked one up that I thought was Dutch based on the presence of a brass side plate. On closer inspection, I see no "RUST" marked safety, no "GELADEN" on the extractor, no acceptance marks, not even a manufacturer's identification. The style of the brass plate, the lettering font, and the letters themselves also don't appear to reflect Dutch usage. The only markings are a serial no 5 that appears in quite a few places. Does anyone have any thoughts on what this pistol might be all about?