[Herb]

Luke, for what it's worth, on page 118 of Fred Datig's book,The Luger Pistol, he states "Naval Models without grip safties and not dated, have been encountered and these are placed as having been produced sometime during the 1908 to 1914 period. Some have been reported not only without dates but also with commercial proof marks and serial numbers".

Not sure if this would apply beyond 1914 but it appears that in 1914 there may have been some of these produced.