Air King 5500 without "Precision" on the dial

[copernic83]

Hi,

I am considering the purchase of a late 70s Air King. It has a silver dial which starts to show some signs of mild patina, and its dial doesn’t say "Precision" in the lower part. I have seen a few like this - how usual / normal is that ?

Also, the dial has the - T Swiss T - mention at the bottom, what would the two dashes mean ?

[Tools]

Precision was a name for the extra jeweled movement that was installed for some markets. Fewer jewels in the movement in some markets was to avoid luxury tariffs.

Your "sigma" marked dial stands for steel hands and surrounds, as opposed to the gold version.

[copernic83]

Thank you very much for your answer !

So, as far as I understand is that the 1520 movement with 17 jewels ? Should I expect a difference of accuracy vs other 1520 movement versions ?