Understand legend on double glazing glass

Hi, New double-glazing, and I'm trying to decypher the legend painted on each pane of glass. At each corner there is Darbytuf Tempered BS6206A KM2070B (the letter B could be a 3)

Now I can make an intelligent guess at the first three lines, but what is the last line for?

Anyone help?

Thanks in advance

Mungo

Reply to
Mungo
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Darby toughened glass?

Obvious. They dip each pane in a bucket of whale oil as they are produced.

British Standards Number 6206A-KM2070B

Reply to
Weatherlawyer

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