Please answer the following question: What key details about john knibb can be extracted from the following bio? Bio: john knibb -lrb- 1650 -- 1722 -rrb- was an english clockmaker born in claydon , oxfordshire . he produced various clocks and watches including bracket clocks , lantern clocks , longcase clocks and some wall-clocks , as well as building and maintaining several turret clocks . even though his main market was catering to customers of modest means , he also dominated the higher-quality sector . only six of knibb 's watches are known to survive .
A:
- death place is oxford- birth name is 1650 1 21 yes- death date is 18 july 1722- birth date is 1650- name is john knibb- nationality is english- birth place is claydon , oxfordshire- occupation is clock - and watchmaker