"Joe" wrote in
ups.com:


hello Otnmbrd!

Long time no see.

It's a USN engraved Stackpole & Brother, Serial Number 337, made in
the mid 1800's.

The indez mirror is cracked.

The arc reads from 0 to + 110 degrees in 1 minute increments. The
silver vernier is left reading from 0 to 20 providing a reading
accuracy down to 3 arc seconds.

The case is original from a dealer in NY. I do not think it has ever
been polished.

I bought it at auction for next to nothing.

Joe



I never heard of them, but that doesn't mean anything.
I would NOT try to polish or replace the index mirror.

otn