Right side of receiver
Right side of barrel
Under side of barrel, serial number, 'u' suffix and another number beneath.. looks like 882 to my eyes.
mark on top side of left toggle.
another view showing marks on receiver and barrel.
There are no other markings on this pistol, apart from the individually numbered parts. Nothing inside the grips or on the frame, no chamber date or rollmark on top of the toggle link.
Any information is greatly appreciated!