This is a compact tight-fitting case for a Mitutoyo 150mm caliper.  It also holds two spare batteries.  It can be printed without supports.  Print shown was with a generic PLA, .4mm nozzle with .2mm layer height.  

For the hinge I designed it to use 4 M4x35 fully threaded screws which screw in firmly and provide a firm and reliable hinge.  

Update 02/26: slight change to remove an interference in the hinge.  Also added V02 model which changed the location of the latch.  

Update 12/08: Added 200mm and 100mm models.  Please provide feedback if you print these.