Rare vintage Seiko 62mas 6217-8001 in Excellent Condition Case is sharp with original brushed finish Dial is clean with desirable creamy light yellow patina on lume Movement is clean and running well. Serviced in 2017 Quickset function works smoothly Caseback engravings are sharp Original crown Asking $3300usd nett to me Bank wire or Paypal (gift or add 4.5%) Buyer pays express shipping (approx. $70 worldwide) Worldwide reference available
Lovely example with just the right amount of wabi sabi and nice sharp case with intact brushings. Glws!
Interestingly the radioactive component (or charger for the luminescent material) is Pm-147 which has a half life of 2.5 years or so. There's almost no energy to be transfered from radioactive decay. The glow you see with 62mas dials is a testament to the proprietary material which held that energy. Interestingly the daini lume holds some charge from other photons (sunlight or uv). It's light decay is much slower than other luminous material of its time. Kind of a precursor to luminova like materials.
That's very good to know because I was always wondering why my small crown 62MAS still glows, doubting the authenticity of its hands & indices paint even though they looked right. Thanks for your answer, @bigsom & @Foo2rama
It’s mentioned in a few reviews of the 6117-8000 navigator timer actually. That’s one way I verified mine. I can’t remember if it was Fratello or worn and wound that talked about it.