Re: WWII German sidearm
Looks to me like a Dreyse Model 1907, chambered for 7.65mm (.32 Auto). They were made from 1907-1919 and were used by Imperial Germany in World War I.
Value around $225-$250 if in VG condition.
The autonomic nervous system provides for involuntary muscle function - the work of breathing, digestion, and so forth. On some folks, that's a pure waste of ingenuity.