A Kodachrome 126 Instamatic slide of the Queen Mary after it had been converted to an hotel in Long Beach, California.
There is no development date on this slide, but the ship was moored in Long Beach in late 1967, so I'm assuming this photo was taken a few years after that, once the hotel had been set up. The cars have a certain, boxy 1970s look as well, so I'd place the photo in the early 1970s.