{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"A practical and theoretical treatise on the detached lever escapement for watches and time pieces","author_name":"M Grossmann","thumbnail_url":"https://www.ebooknetworking.net/books/B00/08B/bigB0008BJ0YI.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B0008BJ0YI.html\">A practical and theoretical treatise on the detached lever escapement for watches and time pieces</a>","width":400,"height":300}