Hi, I have recently bought the above chronometer sold as "for spares or repair". The movement was probably made in Lancashire, England between 1842 and 1845. I have found that the spring detent has broken off and is missing. Please, are any of you able to make a new one, know of a suitable replacement or know of someone who can here in the UK? Any suggestions should be gratefully appreciated. I cannot be the first person in 180 years to need one.