Hi Mich
Just to add to the discussion (as I would be glad of any further insight ).
Using the master reference guide from this site the watch appears to me to be a transitional piece between Ex 2 and ex 3 . The dial is ex 2 T-swiss, however the case and red second hand point to ex 3 - serial number is 195XXX so definitely in that later genre. I know from other discussions and comments in the reference table that the lines between generations was not clearly defined so I'm thinking Heuer used up the tritium dials on later case models ? Does that make sense ?

Unfortunately the original owner died 20 years ago and any of the original provenance is long lost. The watch does not appear to have been modified or tampered with in it's long life and the only cosmetic work I commissioned was to polish the plexiglass. Happy to say working well now sitting nicely on the wrist .

: hi Steve,
: congratulations, very good work, best result.

: Hands, pusher, bezel 3rd ex. serial around 130xxx ?

: Some comments to the dial. smal sub dials with fat rounded fonts,
: low T swiss, like Mk 1 dial
: long indices at 20-40-60, sub dials with beveled edge, like later
: dials Mk 2-4 ?
: are ther more than 2 different dials known at 2446C GMT?

: are there more comments?

: best wishes
: mich