Help me identify my Luger

[beebuzz69]

My second Luger looks much newer and it has been blued. The symbols are much harder to read. I will try my best to translate. rt side has four different markings but there very small, looks like a RG with a crown, 2 sideways 2R with a crown, and then just a crown. The crowns maybe three small circles hooked together. The left side has 1728 than 05 than a N with a crown on the top.