I watched one the other day; Rocky Jones, Space Ranger - Crash of the Moons
Which was nearly bad enough to be special.
I am, on the whole, a little puzzled as to which films are really B&W. What with the colouring-in that goes on these days and the fact that we had a B&W TV for longer than the market wished. The last time I watched African Queen it was 'coloured' I think rather than in colour and I was a little disappointed. [that film though is far better than the book]
I don't know whether it is just that extra bit of atmosphere you get from B&W, the availability of plot or the Studio System that makes so many of these films so special. They were certainly made in an age that was fighting against the introduction of the new medium of television though, this too will have helped.
Here is think the link I gave earlier for those interested. [and to save them the effort of searching]
http://www.bnwmovies.com/