That "hose thing" looks like a decanting whip, which could be really useful to somebody if so.
The three cylinders seem to have have the old style taper threaded neck, rather than the modern 25 mm parallel thread. This means they're likely to be impossible to get tested in a standard dive shop. However, there's an industrial cylinder testing station at Speke called CTS which can test them and their prices are pretty good. (This would mean they can be legally and safely used but dive shops are very unlikely to agree to fill them, so they would need filling on a private compressor.)
Just mentioning this as an aid to any potential takers. (No use to me.)
Can you quote the working pressures Rob? They should be stamped on the shoulders of the cylinders, immediately preceded by the letters "WP".