I primarily collect 1960's sports watches. They all show the 'T' mark indicating the applied lume
is tritium rather than the older radium type.
I've never really seen any blinding fireworks from these applications, and didn't really expect any due their age.
The sun shone brightly all afternoon last Saturday. I left the Enicar Sherpa Graph on the kitchen work top whilst I was
working on my car.
As the sun set, I strapped the watch to my wrist and to my great surprise the lume lit up and clearly showed the time .
It must be said that half an hour later it was impossible to read in the dark.
I decided on a little experiment. I took 3 watches and left them sunbathing for 30 minutes under a standard 13W T5 florescent kitchen cabinet tube .
These are the watches
I then photographed them in the dark. The lume looks more impressive in the pictures, because in an attempt to focus in the dark the camera throws out a beam which enhances the brightness of the lume.
The Super Divette looked very promising to start with
However after 25 minutes it lost nearly all of it's glow and retired.
After a further 10 minutes the other 2 were still glowing
This was the state of play after a further 3 hours
None of the watches have ever been re lumed and all date from 1965 ( Enicar's ) to 1968 ( Gallet )
I was really surprised and impressed that they had any lume functioning at all. Anyone had a similar experience with a 60's watch ?