Check sources for hobbyists and collectors of elements. The set includes a 9g Th-W electrode from a Soviet IFP-800-2 flash lamp, a vintage working (see video) Ra-dial Swiss wristwatch Teriam from1940s -1950s, and an ion chamber with Am-241 used in ionization type smoke detectors. The spectra were measured using Radiacode-102 shown in the photos, which is NOT included in the sale. Buyers take sole responsibility for ensuring the use of these samples in a safe and legal manner.