I recently provided this fuze to try and make a positive identification, but so far I have had no luck. The fuze has very few markings on it. The fuze has two settings "F" and "Sp". There is a number "28" and a very small "C" on the brass portion of the body. There are a couple of markings on the steel portion on the bottom edge (shown in photo). I have measured the height and diameter of various portions of the fuze and these measurements are also shown in the photos.
If anyone can identify it or provide country of manufacture I would appreciate it.
If anyone can identify it or provide country of manufacture I would appreciate it.