I have for trade:

(a) an 80-note Duo-Art aluminum valve stack;
(b) an extra transposing Duo-Art tracker bar;
(c) a late tube-around-the-ends Weber top action;
(d) a metal Concertola stack and original electric primaries for
    the Concertola stack.

I'd like to find one of those Duo-Art top actions with the cones in
the transmission.  I know from experience that the weight they add to
the take-up spool can really rip up old rolls in a hurry, but I'd like
to have one for extra parts.

Bruce Grimes