Celestial nav in a 737? Whoever did that? Doubt it has been even used in a jurassic, much less in a classic or NG. It is simply not needed anymore as apparently it is deemed sufficient to have the much reduced viewing area and TCAS.
They were in place as the 737, in common with the 727 shared to nose section of the original 707, I'm not sure they took star shots from the 707 that often, but I know it was used.