Photos added. To CJS57,
The "white" you are referring to is common to any Luger that is rust blued. The rust bluing process ceased in early 1937. After that date, all Mauser Lugers were dip blued. Also called salt blued or chemical blue. When using this process, the inside that is normally white in a rust blue process is blued along with the rest of the pistol.
Mike
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