Mungo wrote:
Hi,
New double-glazing, and I'm trying to decypher the legend painted on
each pane
of glass.
At each corner there is
Darbytuf

Darby toughened glass?

Tempered

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

BS6206A
KM2070B (the letter B could be a 3)

British Standards Number 6206A-KM2070B