To refresh: This was the question.
It was the "all-ways" fuze used with the Brit No. 69 and No. 81 Grenades. JTG got it correct!
This is actually the fuze from the Castle's "Drill Purpose" No. 69 grenade.
Update: USMC Steve got in *his* answer literally as I was publishing this post - he got it right, too.
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