Antique W.B. Box pocket watch movement, Northampton & London. Signed "21 Upper Charles St, Northampton & London", serial 8426. Size 12 (approx. 37.4mm). Key wind / key set style. Balance is bad — does not run. Includes Roman numeral dial. Condition: Sold as-is for parts, repair, or restoration. Review all photos and caliper measurements. Nice English antique project or parts donor.