I would think they would note it on the paperwork but don't know for sure. Here's what I would expect to see with 2017 tritium, lighted room turn off lights and should be pretty visible, 2005 tritium lighted room turn off lights visible but dim until you get some night vision then it will look brighter. Tritium half life is 12.3 years so 2005 would be about half as bright as 2017.
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