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mondodec
·I'm sure your English skills are superlative!
In reading the conversation, there seems to be two issue being discussed here. The T issue and the fact that some Omegas were produced with only luminescent hands and not markers and bore the mark T Swiss Made
The ISO standard when the document was published by FHH seems to differ from earlier publications that I recall, and I referenced that to demonstrate there was a standard,. I believe the Tritium content was reduced over time and ISO 3157 was probably the last determination. One point that I would offer is that all luminescent material is created in a stabilising 'ground' and then applied, and so, arguably, it depends on the strength of the mix as to whether we see one or two Ts. I would expect the mix strength to be much more concentrated, for example, on the thin tritium inserts on the dauphine hands of some Omegas of the sixties for example.
In terms of Constellations I've seen over the years that I judged to be factory original at the time, I've often seen the one T with models that only have luminescent hands, and explained it to myself as above. I'm simply relying on memory, but some enterprising individual with too much time on their hands could, over time, build up a collection of examples to come to a reasonable determination.
To muddy the waters even further, in the US where the 'glow in the dark' craze first took off with non tool watches, I know Norman Morris often swapped hands on order from various retail outlets, and so there could be many examples sold in the US where there is no T but with what appear original hands.
The last ISO standard as mentioned for T Swiss Made T was 7 millicuries.
In reading the conversation, there seems to be two issue being discussed here. The T issue and the fact that some Omegas were produced with only luminescent hands and not markers and bore the mark T Swiss Made
The ISO standard when the document was published by FHH seems to differ from earlier publications that I recall, and I referenced that to demonstrate there was a standard,. I believe the Tritium content was reduced over time and ISO 3157 was probably the last determination. One point that I would offer is that all luminescent material is created in a stabilising 'ground' and then applied, and so, arguably, it depends on the strength of the mix as to whether we see one or two Ts. I would expect the mix strength to be much more concentrated, for example, on the thin tritium inserts on the dauphine hands of some Omegas of the sixties for example.
In terms of Constellations I've seen over the years that I judged to be factory original at the time, I've often seen the one T with models that only have luminescent hands, and explained it to myself as above. I'm simply relying on memory, but some enterprising individual with too much time on their hands could, over time, build up a collection of examples to come to a reasonable determination.
To muddy the waters even further, in the US where the 'glow in the dark' craze first took off with non tool watches, I know Norman Morris often swapped hands on order from various retail outlets, and so there could be many examples sold in the US where there is no T but with what appear original hands.
The last ISO standard as mentioned for T Swiss Made T was 7 millicuries.
