It seems that Seiko started using Promethium in the mid-80s and discontinued it around 1991. It was certainly used on the Gen 1 RAF quartz chronograph, not sure about the Gen2.
Eddie
Type: Posts; User: swanbourne
It seems that Seiko started using Promethium in the mid-80s and discontinued it around 1991. It was certainly used on the Gen 1 RAF quartz chronograph, not sure about the Gen2.
Eddie
whether they were from the 70´s, is beyound my knowledge, but I´m sure we should find out soon. Maybe Arian or someone else who has more qualified information would like to submit their opinion on...
Interesting that you have a Prometheum JLC, so do I. I always assumed that these were MoD redials from the 1970s.
Eddie