DiaStar “Deluxe Chronometer” case

[JPinOman]

Has anyone come across these DiaStar case markings before?

I seem to recall an old ad for a “Deluxe” DiaStar





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[watch carefully]

Hi John,
I have not seen that case back before...and would not expect it with a round bezel!

Some 1980s-1990s DS chronometers were referred to as deluxe, but they would have had 8-digit reference numbers, I believe (not the 333 number pictured, which I assume is a casemaker's serial).
Brad

[Henry Krinkle]

That engraving doesn't look consistent for what I assume would be the age of that case. On the other hand, I don't recall a six notch caseback like that, but I do not question the case's authenticity.