Engine parts (24) - Champion - Set candele Champion in valigetta - 1960-1970

Hard-to-find presentation case showing the construction and operation of Champion spark plugs for internal combustion engines.
21 items housed in a blue velvet interior.
8 complete Champion spark plugs, one cutaway plug set in plexiglass, one with an electrical connector for testing, and 11 components from the same plugs—one broken and glued back together.
Also included are two original feeler gauges and a very rare Champion pen for centering or adjusting the center electrode.
The pen was always getting lost and is extremely rare.
Case weight: 1,600 g.
Suitable packaging.