Compass - Brass - Marine , Stanley London , Natural Sine , large , navigation professionnel

antique brass maritime compass signed Stanley London, presented in its original wooden box with a felt-lined interior. The instrument is equipped with a sighting mirror and a “Natural Sine” correction table, typical of professional navigation compasses used in marine and surveying.
The engraved rear plaque confirms British manufacture.
The whole is in good preservation condition with a beautiful patina from its era, attesting to its authenticity.
**note: the bubble level is detached ***