Watch movements are arguably the most important part of a watch: as the heart and brains of our timekeeping devices, you need to have a movement if you want your watch to work. The ISA quartz watch movements are multifunctional and built to last with high quality watch parts. These Swiss made quartz movements are made to fit a variety of small watch cases and are at the cutting edge of efficiency. These high quality watch movements will help you retrofit a watch and replace mechanical movements.