The JBT Red Book Sectionals app is a 6 Month paid Subscription Service. JBT Sectionals Red Books are subsets of The Jewelers Board of Trade (JBT) Annual Reference Book containing over 30,000 jewelry retailers, wholesalers and manufacturers in the U.S., Canada and international. For JBT Members only. JBT provides credit reporting, collection and marketing services for the jewelry industry. Empower your business with the largest database of jewelry-related companies located in North America to Find New Customers, Know Your Business Partners and Get Paid.