Renewing the sprocket and click spring for a thirty hour long case movement.
The spring had broken and got tangled up in the great wheel, to replace the spring the sprocket and sides had to be dismantled to replace the spring.
The customer had mentioned that the chain was slipping when the clock was running so the next task was to look at the sprocket to see whether the sprocket should be replaced.
The out come was that the sprocket was somewhat smaller than the other one in the clock so the best solution would be to make a new one the same size as the other one in the clock as it showed very little wear. The material used was sand cast brass which would give a very similar colour to the original parts in the clock.
The old spring was made af fairly soft steel, (easily bent) so the new one was made from a soft mild steel it had enough elastic limit to not need any form of hardening.
Views from the work bench 