Jack,
The Imperial marking requirements for Lugers require "a heraldic eagle" to be stamped as power proof marks. The two eagles you show from the 1915 thread are actually different, the receiver eagle is the style usually associated with the Erfurt armory and the breechblock eagle is the style usually associated with DWM.
The Prussian eagle, as seen on the trigger guard, is a heraldic eagle, as well.
--Dwight
The Imperial marking requirements for Lugers require "a heraldic eagle" to be stamped as power proof marks. The two eagles you show from the 1915 thread are actually different, the receiver eagle is the style usually associated with the Erfurt armory and the breechblock eagle is the style usually associated with DWM.
The Prussian eagle, as seen on the trigger guard, is a heraldic eagle, as well.
--Dwight