Yes, a great piece of work by Mika to complete this one and well-told on Calibre 11 -- https://www.calibre11.com/from-the-vault-vintage-heuer-carrera-blue-dial-7753bt/

But you are correct that all the watches made from the test dials come under the "unobtainable" category.

If only Heuer had decided to make this one!!

Jeff

: I love the chaotic Heuer history - I learned of a new Carrera this
: morning that immediately became a “personal grail” for me!
: Though in reality it is certainly in the category of
: “unobtainable” as defined by Jeff...

: It’s a 7753 Carrera with a metallic blue Tachy test dial - would
: have been a fantastic addition to the Heuer line up.

: Check out the story on the @Calibre11 Instagram feed and Mika’s
: vintageheuercarrera.com website.