another ethnic folder i like is the barrel knife from sweden, they are each unique and the parts are not interchangeable.
this is sometimes referred to as an '1874' model as that was when it was 'patented' in the USA by a maker who had learned to make them in sweden, one of the swedish makers, john engstrum stamped his with the date he started making them, also 1874, this is NOT necessarily the mfg. date, he made them from 1874 thru 1918 and all were stamped 1874. they were made from 1864-1925 by the major mfg. mine is a p. holmberg, made between 1900-1920, 2.75 in. barrel.
photos showing how it's opened (reverse sequence to close
unlocked and removed from grip - there is a little spring loaded pawl/lever near the ring
blade swinging into position. you can see the little spring locking thingy
reinsterted and locked into grip and you have a nice scandi fixed blade knife.