Errr ... G'day yet again Jim!

I was sure that Mark Schuster had some sort of a web site ... but it took a lot of finding: ozbox.net/instruments

This link takes you straight to the page with the photograph of Mark Schuster (stnding, right side). I presume the box he is holding is the "massive German Six-Stopper", to which he refers, and I suspect it should be quite like the one you have.

If you want any detailed background on things like the (presumed) 'quint' stop, I'll bounce them off Mark directly ... or you may prefer to approach him yourself.

Regards,

Bob