A lot of the older divers in this part of the world carried claw hammers, spanners and pry bars on their weight belts. There is an old war time catalina wreck that is very popular in the Clyde, my fellow divers have torn it to bits over the years. Wrecks are generaly safer today, in the 60's copper degausing cable and brass was well worth salvaging, and mercury was worth a fortune. Sorry you are short of old bottles I could fill warehouses with them, there are so many lying around on the bottom of the Clyde, but why bother. What we are really short of these days is fish. Perhaps we should persuade our government to let us sink the decommisioned trawlers for the future generations of dive tourists.