I have noticed in the past that quite a number of the early black dials, that have lume hour markers, have a tendancy for the black of the dial to change to some degree to a chocolate brown. In particular i note the 1163 GMT dials have gone this way.
Now we have discussed previously on the forum that a particlar year range of paint used by the dial producer is known to change colour. Its also noted in other brands ( i want to say Rolex but i cant recall 100% ) at around 1970-71.
This chocolate effect on the dial could be a good way to try and date the dial's production & therefore prove your watch is an actual production model as the 11630 Autavia's were not made until a couple of years later.
Anyone have more to offer up on this thought ?

Cheers - Darren

: A few months ago I bought an unusual 1163 which had the dial with
: luminous markers (relumed at service and hands replaced by Tag
: Heuer before I bought it) rather than the usual Orange Boy dial:

:
:

: I just missed out on another one at an auction house in the UK:

:
:

: I didn't have the opportunity to go to the auction house to check
: the lug to see if it has the extra marking mine has. Obvious
: differences are that my dial is a lovely chocolate colour and
: has kept the orange on the hour markers while the auction watch
: appears to have a normal black dial with faded markers.