The one you picture was made by DWM in Berlin for the Swiss.
Some of these were shipped in the white and final finished by the Swiss. The one you're looking at has the Swiss cross in Sunburst, and is an earlier variation than mine...
In general the Swiss made guns and the German made ones for the Swiss embody the definition of high precision. They are my favorite Lugers. They have higher valuation.
This picture shows the major variations... DWM M1900, DWM M1900/06, W+F M1900/06 Waffenfabrik Bern, and W+F 06/29 Waffenfabrik Bern.
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Igitur si vis pacem, para bellum -
- Therefore if you want peace, prepare for war.