Original Imperial Japanese WWII Inert Relic Type 11 Incendiary Smoke Grenade with Removable Lower Booster - Very Rare Rear Sight Assembly indicating that these are a

indicating that these are a matched set

Large spanner for disassembling the muzzle attachment

The squadron's air echelon ferried their B-17s to England via the north Atlantic ferry route

and reasonable effective detonation

: 昭 和 十 九 年 二 月

Original Imperial Japanese WWII Inert Relic Type 11 Incendiary Smoke Grenade with Removable Lower Booster - Very Rare Rear Sight Assembly indicating that these are aOriginal Item: Only One Available. This is an exceptionally scarce original Imperial Japanese WWII Type 11 incendiary smoke grenade in heavily worn relic condition. This is only the third Type 11 example we have offered, and it retains its loose fuze assembly together with the removable lower booster component, which is almost always missing from surviving examples. This grenade has been completely demilitarized and is represented as entirely inert,