The first is a square. the rosewood inserts are for insulation purposes to
limit distortion when handling.

The second is a sine bar.

The square can be rescued by grinding/scraping and a lot of work. The sine
bar
can probably be rescued by replacing the tube sections with sections from the
same piece of drill rod of an appropriate diameter if there is no corrosion
on
the body where the tubular sections met it... probably not worth the effort.


Regards
Mark Rand
RTFM

Thanks for the info, I appreciate it. I'm new enough at this that the more
interesting things are still on the foreign side.

The square's really in pretty good shape. The sine block's pretty rough, so
that's probably a loss.

GTO(John)