The rich development phase of the Flightmaster and its evolutions have been documented in the Flightmaster Only book, thanks to the collaborative work with the OMEGA Heritage team.
This article focuses specifically on the complex transition period between the first two generations of Flightmasters that took place in a very short period of time in 1971, and thus provides updated information for the aficionados of the Flightmaster models.
This story begins with an internal report of a meeting at Lemania, which took place on May 21, 1970.
One of the topics of this meeting was to initiate a reflection on the development of the Flightmaster model, reference ST 145.013, with the caliber 910. Two features were mentioned:
- modifying the current domed crystal with a flat mineral crystal,
- and replacing the AM/PM indicator with a small second indicator.
At another meeting, which took place on September 23, 1970, and despite the preference of professional users (such as pilots) for the small second indicator, the participants agreed to retain the AM/PM indicator, which was, according to them, “a strong marketing element”.
The idea of producing two versions, a “professional execution” with the small second indicator for the professionals, and a standard version retaining the AM/PM indicator was even raised.
The documents currently available do not allow to shed light on how exactly the decisions of the September 1970 meeting were overruled, but it is evident that further discussions / decisions occurred shortly thereafter, prior to a November 1970 meeting, where it was ultimately decided that the new Flightmaster would swap out its AM/PM indicator for a small second indicator.
Based on the timeline of these OMEGA meeting minutes, it is evident that there was a sudden decision to replace the AM/PM indicator by the small second indicator. The impressive pace that followed to develop the new Flighmaster (reference ST 145.026), powered by the caliber 911, gave rise to several transition versions which will be detailed below.
The complexity and suddenness of this transition period is also illustrated by some Flightmaster production files from the OMEGA archives (shown by the OMEGA Heritage team), where the reference and caliber have been corrected (updated) by hand.
When we worked on the Flightmaster Only book back in 2017-2018, it was clear for us that:
- Reference ST 145.013 = caliber 910 (24h) up to serial 31.634.999,
- Reference ST 145.026 = caliber 911 (running second) from serial 31.636.000 (there are no Flightmasters in the 31.635.xxx range).
Although the OMEGA archives show that some Flightmasters in the 31.636.xxx range were reference ST 145.013, we were convinced of this breakdown between the two references. But we were wrong…
Indeed, recent observations have shown that in this famous 31.636.xxx range, some Flightmasters had the early, thinner case, but the new caliber 911 and therefore the new dial with the small second subdial.
Furthermore, extracts from the archives corresponding to these observations confirmed that the reference was indeed ST 145.013.
These new findings led us to provide a new classification of 3 transitional models for this period.
Credit: Mathias Huebner
Credit: Watch Books Only / Luca Garbati
Credit: Watch Books Only / Luca Garbati
It is remarkable to note that all the observed transitional models were produced in a very short time frame, between September and October 1971.
Another example of this crazy transition period can be illustrated by this prototype dial, full black, but with an AM/PM sub-dial at 9 o’clock, similar to the green one of the 145.013 standard models.
Please note that this dial has no step, unlike the standard 145.013s’ ones.
The icing on the cake
We have unveiled what is likely one of the development models for this transition period. This is a hybrid model that used one of the very first caliber 910 (29.130.019, the 20th in the series), which remained uncased in 1969 (no delivery date or destination in the OMEGA archives), but probably modified in 1970/71 with the replacement of the AM/PM module with a small second module, before the production of the caliber 911.
The case is of course the reference ST 145.013. The dial is also a former AM/PM dial, modified with the small second counter. Note that the tritium dots at 3-6-9 have not been removed, unlike the other transitional dials. In addition, all counters have a nice tropicalization. Finally, the usual blue GMT hand has been replaced by a simpler “baton hand”, but of a specific length.
Credit: Watch Books Only
After this prolific period, the regular production of the ST 145.026 began probably in October 1971, replaced about one year later by the ST 145.036. But that’s another story…