1980 BT Logo

As I passed a jointing-chamber hatch today I asked myself 'Does that logo have something encoded in the dash-dot-dot?' That's actually Morse for the letter 'D', which seems like a missed opportunity. What is DT?

How about dash-dot-dot-dot for a letter 'B', giving a secret encoding of BT.

BT_Logo_1980_Redesign.png

Pity I'm 36 years too late with this idea.