I inherited this 2436C two years ago when my father passed. I finally was able to have someone look at it. They said basically it needs a full cleaning, the past oil has turned to dust. New mainspring, timing and Chrono adjustments. It is an heirloom so I don’t want any buffing or polish, just service and replace needed parts. Was quoted $1250 for the job. Does this sound reasonable? Here was a video I made before it stopped working. A couple pictures as well.