This item is being sold as found from a watchmakers estate. We are selling several items and groups as part of this estate. Please check our other listings to see what else were offering. And check back frequently as well be adding more items as we process them. Please see photos for more detail and consider the pictures to be part of the item description. I have limited knowledge of the details of this item. The description above is based on my best research from the internet and labeling on some of the packaging and/or pieces. We are happy to combine shipping on multiple items. *PLEASE NOTE: The picture is of a single item but multiple quantities may be available. Please be aware that the packaging may not exactly match the item pictured. The parts are still in new old stock condition.