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Harry_in_London · 25 March 2012, 05:43 AM

Hello All,

A quick question - Please could you tell how you can tell the difference?

I'm looking to buy a vintage Explorer 2 and I think the hands have been changed to Lumi's, but I am not sure.

Thank you

Grey.Coupe · 1 April 2012, 11:40 PM

Lumi responds to light, tritium doesn't. Hold the watch close to a light bulb, or other light source--a flashlight will do. If it is lump, or a variant thereof, it will beam brightly for a period afterward.

Tritium will glow independent of being exposed to light until it poops out [years later].

25 March 2012, 05:43 AM	#1
Harry_in_London "TRF" Member Join Date: Mar 2012 Location: UK Posts: 2	Difference between tritium and lumi hands Hello All, A quick question - Please could you tell how you can tell the difference? I'm looking to buy a vintage Explorer 2 and I think the hands have been changed to Lumi's, but I am not sure. Thank you

1 April 2012, 11:40 PM	#2
Grey.Coupe "TRF" Member Join Date: Dec 2009 Location: NC, USA Posts: 555	Lumi responds to light, tritium doesn't. Hold the watch close to a light bulb, or other light source--a flashlight will do. If it is lump, or a variant thereof, it will beam brightly for a period afterward. Tritium will glow independent of being exposed to light until it poops out [years later].

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