All Original Vintage 1940s Sinclair Refining Company Lubrication Index shop binder containing many chart pages for various different car and truck makers. Tabs have pages in alphabetical order per brand. This book has a serial number of K 22586 and costed twenty-five dollars in the 1940s. Looks to be complete with many pages. The binder and interior pages are all in very solid and great condition. The index book is heavy as wasn't made cheaply and meant to last. Even with age and use this binder is an awesome Sinclair piece of history. Measures 11 1/2" x 10 1/2" x 3".