Watch List notes:

Section of bone plate with marked scale from an octant, ex-Colossus (1798). 2 grams; 2-1/8" long, 1/2" wide. Finely etched bit of bone with the numbers 5 and 10 spaced 2cm apart, the whole piece slightly bowed as from its use on an octant. From the Colossus (1798), with Roland Morris Maritime Museum certificate and booklet The Search for Colossus (2005).
($200-300)