So, I have a Hebdomas Pocket watch that was fully disassembled that belonged to my grandfather. It seems to be missing the main spring, the bridel and the hair spring. I really don't know much about watches, but I would really like to get this watch working. I have put it back together with the help of youtube to see what is missing and those three parts seem to be it. I have located several listings on ebay but it seems I have an unusual size main spring barrel. It's 35mm. Not sure about the hair spring but I do have the balance wheel. I have attached a photo of the watch if anyone can tell me a little more about it and if there is anyone out there with info to obtain the items I need or if they know anyone that repairs them.