Two examples now have surfaced, on different continents, and both from what looks to be non-collectors.
It looks to be the same dial, inside different model references (20217-4 and 20214-4).
One is a first execution (164 serial) and the other a second execution (168 serial).
Both are -4 references (lume should be on both the dial and the hands), however one example has lumed hands, and the other does not.
The most unusual thing about this gold capped one, to me, is that the serial number (1648118) lies way outside the range expected for a 20214-4 (1649039 to 1649098).
The serial lies in the range expected for a 20217-3 (1648027 to 1648151).
https://universalgenevepolerouter.com/reference-tables/reference-table-steel-gold-plated/
Perhaps it could have been a custom order, and they took whatever serial they were up to then?
In this case, there would probably have been a minimum production number (they were printed, not engraved).
More questions, and more speculation of course...
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