IF I'm reading Gortz & Sturgiss correctly, the cross-in-sunburst was last used at serial number 9000 of the 00/06 model. On the left side of the receiver should be +/V and then a small Swiss Federal cross. A small Swiss Federal cross should also appear on the left side of the barrel and on the back of the frame. The +/V was the inspection mark of Major Vogelsang who retired in 1912.
From serial number 9001-15215 (the end of DWM Lugers provided to the Swiss due to the war), the cross-in-shield was used.
As far as "rework" stamps, I'm not familiar with any that the Swiss may have used.
Below is my cross-in-shield 00/06 that was assembled by W+F in Switzerland from parts provided by DWM in 1910. The markings should be the same as on the earlier cross-in-sunburst.
