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Old 30 August 2021, 08:29 PM   #1
watchmainspring
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Does wearing a "swiss only" watch in the sun slowly wear out the lume?

Not like I am going to change my habits. I bought some used hands off a swiss-only watch and its not as bright as my swiss-only dial. Trying to figure out the reason. Thanks.
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Old 30 August 2021, 09:24 PM   #2
linesiders
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Need photos, but lume ages differently over the decades. They could have different lume compounds, exposed to different moisture over years, plenty of reasons
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Old 30 August 2021, 09:25 PM   #3
watchmainspring
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Quote:
Originally Posted by linesiders View Post
Need photos, but lume ages differently over the decades. They could have different lume compounds, exposed to different moisture over years, plenty of reasons

Both are luminova. I'll get pics tomorrow.


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Old 30 August 2021, 09:59 PM   #4
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Are you certain its Luminova thats been used ?., Luminova wasnt invented until 1993 and didnt become widely used until about 5 years later. It does have a 'lifespan' (usually about 25-30 years). Pics would certainly help
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Old 30 August 2021, 11:46 PM   #5
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Yeah, we really need photos and to also know what ref you're talking about.

Service dials for older 4 digit references were "Swiss" only but used super luminova as opposed to luminvoa.
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Old 31 August 2021, 12:17 AM   #6
linesiders
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Some older SWISS dials were radium, most 80s and later are luminova.

So there is a LOT of missing information to even know what generations we are talking about
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Old 31 August 2021, 01:31 AM   #7
watchmainspring
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I'll update tomorrow. Working with a 1991 16618 with a Swiss only dial and tritium hands. Hands are luminova off a Swiss only dial either 16618 or 16613.


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Old 1 September 2021, 05:29 AM   #8
watchmainspring
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okay I was wrong. The hands are identical to the dial in terms of color and intensity. Just needed a better comparison. Sorry. /post
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