size11s
·Promethium was also used on the Seiko gen 1 & 2 RAF watches from circa 1984 well into the 1990's.
Please consider donating to help offset our high running costs.
Promethium was also used on the Seiko gen 1 & 2 RAF watches from circa 1984 well into the 1990's.
The continued use of promethium lume on Seiko Gen 1 and Gen 2 RAF watches in the 1980s and 1990s, despite the broader industry's shift to tritium, was primarily due to specific procurement, regulatory, and operational requirements within the UK Ministry of Defence. Promethiumoffered lower radioactivity and a sufficiently bright initial glow, albeit with a much shorter half-life than tritium.
In some cases, promethium was favored because it posed fewer handling and storage restrictions under transport and health regulations compared to tritium and could be serviced on a predictable schedule due to its rapid fading. Additionally, standardization across government contracts and the desire to avoid cross-contamination with sensitive equipment (especially in aviation and submarine service) influenced the MoD to maintain promethium use on selected models even as tritium became more common elsewhere.
Thus, the decision reflected a balance between operational safety, regulatory frameworks, and supply logistics rather than purely technical superiority.
An other Omega W.W.W dial variant, fitted with a VB dial; no clue if it has seen some action though
To my knowledge, two watches were fitted with VB dial only:
- Omega 10033
- Record 10034
Two watches were fitted with NSN printed on the dial:
- Record
- IWC
In addition, various MoD dials were made with the brand name reprinted on it.
May I ask if the chronograph seconds hand is the one at the 6 o'clock subdial or the large central seconds hand? Thanks 😊
Also, if the subdial at 3 o'clock records tenths of a second, then I'm guessing that the little hand would be spinning around like crazy when the chronograph is in use.
Here's the link: https://uhren-muser.de/en/catalogue/62125