Oh I do love this poster.
It’s by Lewitt Him and was issued in 1948.
Now I always associate it in my head with this design of theirs (to the extent that I am continually surprised to find out that we don’t just have the same poster in two different sizes).
But this is a wartime one, from 1941, and has nothing at all to do with Christmas. It’s not just the twin outsized letters, I think it’s also the matching red dots of sealing wax that confuse me too. It’s a bit unfair really, because they’re not really recycling the design that much. I’m just easily confused, especially this time of year. They are both still brilliant, though.