I thought I'd do a hunt around and see what evidence I could find for the different iterations of the Navitimer slide rule,
and in particular when they might have brought in the red markers.
I posted a 1964 dated Navitimer and it was suggested that by then Breitling had adopted the red marked slide rule, a rough change over of 1962 was suggested,
however from what I can see this is not necessarily the case and plain dials/slide rules might have been produced much
later. I thought it would be fun to open it up for discussion and see what info could be gathered.
I started by looking at the 1969 catalogue, whch shows the two red sliderule/dial variations that I've come across.
There are two obvious differences in the later slide rulers, the easiest place to spot it is on the 10 on the slide rule,
in one version there is a small triangular arrow and in the other there is a square box around the ten. Navitimer's
I then had a look at some advertising that Breitling used in 1967 and which I posted earlier.
There is no arrow or square at the 10 mark on the sliderule, which says to me this is a plain non-red slide rule.
So at least as late as 67 Breitling were advertising this version.
Then I looked at a well established post of someone who bought a Navitimer in 1967 and has personally owned and serviced it throughout it's life.http://pippick.com/reviews/NavitimerReviewPt1.htm
Since Les owned the Navitimer from when it was bought he knows its full service history. While searching my harddrive I found an old post by him on
the original Watchuseek Breitling forum.
I also had a look at Breitling's Vintage collection on Timezone. http://people.timezone.com/breitling/bf ... ction.html
They have one classic Navi, described as follows:
Item #14, Navitimer, ref. #806, circa 1964, manual wind Venus 178, steel, no red on slide rule, original Navitimer logo
Also Kurt's Navitimer article has a 1966 Navi complete with box and papers which he says is unused and he purchased
it from the original owner's widow. It shows a plain slide rule.http://people.timezone.com/breitling/bf ... timer.html
Certainly to my mind it seems that Breitling continued to produce different variants of the dials and slide rules through the Sixties.
My supposition, and this is just my personal guess, I would imagine that the dial and sliderule would be matched, if it is a plain dial
it should be a plain sliderule, if it has a square on the ten on the dial it should have a square on the 10 on the sliderule,
if it has an arrowhead on the dial it should match the sliderule.
Weirdly I found very few catalogues or adverts for the white 806, if anyone has some they can post it would be very interesting.