Here we have two vintage original unused military desalter kits, one solar still drinking water and a solar sea water distillation kit. Nice military collectibles. There are two 1957 Mark-2  sea water desalter kits, which measure about 5" x 4" x 2 inches. The solar still drinking water kit is from 1949. The  solar Class B sea water distillation kit is from 1956. Items have wear appropriate for their age, as you can see from the photos, but they do look like they have never been opened. Don't hesitate to ask questions.