Arcs of boxwood; limbs of rosewood. Replacement wooden vanes; slit and pin hole sights, chamois lined, replacement brass horizon vane. Signed inside lesser arc; fleurs-de-ls at ends of inscription, roses between words. Greater arc, 0-65 degrees every one degree, with vane edge calibrated 0-60 degrees every five degrees. Three fleurs-de-lys. Short arc, 65-90 degrees every ten degrees in inner edge, and 0-25 degrees every five degrees on outer edge; by transversals to one degree. Roses, circles, and fleurs-de-lys on arc; scrolling end. This backstaff (A-137) consists of multiple parts, some located on 25/3
Material
Signed on the inside of the 30-degree arc: "COLE MAKER LOMBARD STREET LONDON"
"IOSEPH IACKSON 1746" on owner's plate on horizon limb.
