[GreenKeys] Colossus is 73

[Sam Hallas]

W2HX wrote:
> I visted bletchley a few years ago and saw it. It was amazing!
> Eugene

Just up the road from me. I was there in 2015. It gets better every time 
I go.
Here's a picture of the Colossus demo area with a volunteer explaining 
to the visitors.

Sam




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