Overall: 5 x 19 3/8 x 5/8 in. ( 12.7 x 49.2 x 1.6 cm )
struck: on each pin joint: "DRG"
Steel compass; steel bar with brass stops at termini; two steel pins with marked spherical brass joints which allow them to slide across the bar.
The maker, David R. Griffith, was a naval maritime constructor in the Civil War.
Gift of Frederick Griffith
Due to ongoing research, information about this object is subject to change.