Dear Kalafiorek,
you can get the measurment certificat by 470 class. Take a look at the imprint
on the page from www.470er.de and you´ll find the adress. You can also call to
+49-201-237087, it´s the number from AS 470 Deutschland e.V.
If you get the measurment certificat you can find the age on the document.
Greeting,Johannes
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