the frame serial area is unnumbered and also does not have a typical navy spec 1916 date on the left external frame rail just in front of the sideplate - so seems like this is not the case of an original navy. note that the barrel does have the typical date on the left side of front sight base. if the bottom underlug of the slide has 80/unnumbered then it is very likely orig to barrel
it is very unusual to see a frame that is not numbered on the front flat area just below where the slide rails engage the frame rail recesses - usually these are thought to be unauthorized frames ( lunchbox specials ) - but could also be a case that some importer purchased a batch of generic frames for later merge with an assortment of the various barrel lengths available ( my guess in this case ). in that case this would seem to be 1920 series when some military parts were provided to export
also the frame unnumbered vertical area seems a bit taller than usual so could be a serial removal and then a factory or vendor reblue - looks more factory to me
orig navy sight would enhance value but also is likely a $300-500 added cost and likely still be mismatched as would the breechblock asy and middle toggle - breechblocks on the orig navys also have the navy crown proof
if someone had a spare nice orig toggle to add and wanted a luger shooter this would be a very presentable shooter and lots more orig than a fake navy
Bill
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