This is a press for closing a snap-fit large format watch (Fossil) after battery replacement. The design uses three bolts and was printed in PETG with 100% infill. I have included the design file (solvespace). The tolerances are a bit tight, but I didn't want the watch moving and breaking the glass. I used it yesterday to reassembly my watch and it worked fine. Obviously your watch may/will be sized differently, but hopefully this design and files will give you something to work from to produce a 3D part with enough strength to actually work!