While exact production logs for sextants are rare, Buff & Buff serial numbers reached 12,759 later in their history (early 20th century). A number in the 11,000s is consistent with a 1918 (late WWI) production date.
Buff and Buff 1918 US Naval Sextant in Original Mahogany Box
While exact production logs for sextants are rare, Buff & Buff serial numbers reached 12,759 later in their history (early 20th century). A number in the 11,000s is consistent with a 1918 (late WWI) production date.