Signature: Tompion, Lond. (on movement); Tompion (on dial)
Marking: Outercase:
[1] 712 (on rim);
[2] 721 (inside);
Innercase:
[1] + over N (D) (punched inside, probably for Nathanial Delander);
Movement:
[1] Tompion London/20 (engraved on backplate);
[2] + over 220 (punched on pillar plate);
[3] 20 (inside of chapter ring);
[4] 720 (dial plate, movement side);
[5] (7)20 (dial plate, dial side);
[6] 720 (scratched, underside of cock)
