Thanks for the copy of the matrix you sent me.
I have gained a lot of knowledge from it, not only for the Monarch's, but other Dietz lanterns as well. It's true that you can date a Monarch to within a few years by using a few of the characteristics of the lantern. You do not have to strip paint, sand rust or do anything to alter the condition of the lantern to learn the manufacture date within a few years. It's great that you are freely sharing what you have spent many hours and investments in lanterns to develop information that I'm sure many people would pay for.
Please keep me current on my version if you have any changes.
Thanks,
John M
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