Do you know anything about these bridges?

[Sandu]

I've seen them on Douglas basses mainly, but also on others, and in a few hardware shops in Europe. Does anyone know the manufacturer, the metal they're made of, anything? They appear to be monorail types on a base plate, lockable via hex screws, with adjustable height, and string-thru.

[steve4765630]

It's probably proprietary. Some of the Chinese Peavey Cirrus basses have a similar system. They are probably brass, but there's no way to tell for sure unless you chip away some chrome.

[Tapper]

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http://www.guitarpartsdepot.com/prod...&product=13446