I love it that you found the "lost and found" DE-1 at a Loppemarked (flea market)!  Usually you are lucky to find a nice bottle opener, let alone a truly rare bit of Nikon kit!  And the fact that it was almost certainly "the" DE-1 missing from your F2T is crazy.

A glimpse of the "lost and found" DE-1 (left) vs. the standard model DE-1 (right). The difference in exterior finish is obvious when these units are seen up close. A gentle scraping off with a knife in a hidden spot discloses the different material, too.

Don't let the slanted perspective fool you into thinking there is a size difference -- I did this to allow the reflection of the finder face be visible.

Unbelievable, Birna.
Wonderful story.

+1

NG is under attack.

There is a hostile take-over attempt ongoing.

Expect disturbances ahead.

And today: 23888!

My copy of the electronic Nikon F to Z adapter arrived from Japan in 8 days to Australia - half of which was involved in covering the last 55 km from Melbourne airport to home!!!

I can confirm that my copy has the same excellent finish and fits that Birna reported in respect of her copy.  The fits are a nice change from an expensive German adapter that I have whose fits are just impossibly too tight.

An English manual is here - mine arrived with a Japanese one.