I think what you saw was the nose is composed of two parts. There is a glass section over the windscreen which retracts below the line of sight whenever the nose is drooped. The nose has three positions. Up, mild droop (for taxi, take off and just before touch down) and extreme droop for approach.

I saw the AMT Concorde recently and was told they are waiting thrust reversers for the remaining two engines. However, it has been a long wait and obviously they have been beaten to the punch as it were. Even the small shot in RCJI shows more detail then the AMT one up close.