Hello Dave,

It is hard to give a real precise value on your Thatcher. I've
seem them go as low as $500 or so, to several thousand dollars
in mint condition. From your description, it sounds like yours
is in good shape, complete with instructions too. It sounds like
a fine piece and I would say worth at least $1000. Congrats on
your wonderful inheritance!!!

Regards,
Miles Schumacher


--- In slideruleforum@yahoogroups.com, "garand1947" <being@b...>
wrote:
> Hello;
> I'm afraid I joined this group to pick your brains. I inherited a
> cylindrical slide rule called "Thatcher's Calculating Instrument"
from
> my grandfather. The machine appears to be in perfect condition
(albeit
> somewhat yellowed with age), in a well-made wooden box with a book
of
> directions (1932 copywrite date).
>
> Can anyaone advise me of the potential value of this instrument?
>
> Thanka you in advance for your consideration
>
> Dave Eizinger