Receiver and Barrel
More Information coming soon!
Nothing exciting about markings, I’ll put some more in later anyway.
The Heart is a traditional Swiss proof mark.
There are five serial numbers on each model 1908.
If the rifle was converted to the FSK15, three additional serial numbers were added. One to the knurled Bolt lock (keeps gun in auto mode). one to the 30 round magazine release ( the new release blocked the view under the trigger guard) one at the front of the gas tube.