Silver Half Hunter English Lever

An early 20^th Century English lever in a silver half hunter case.  Gilt three quarter plate keyless movement with going barrel.  Plain cock with polished steel regulator, compensation balance with blue steel overcoil hairspring.  English table roller lever escapement, screwed in jewelling, escape and lever pivots with endstones.  White enamel dial with subsidiary seconds, Roman numerals, blue steel half hunter hands.  Plain silver half hunter case with blue enamel chapter ring.  Gilt winding button, maker's mark "JK" in a diamond.