Antique Windsor & Newton Agate burnishing tool, for applying gold leaf. this is a high-quality item made for the most wealthy clients. Constructed with a nice detailed wooden handle and silver plated feral containing a beautiful hand shaped piece of agate. The agate in this particular example is of extremely good quality and beauty  and is in excellent  undamaged condition very hard to find in this condition . Size 20 cm long. Both a quality and beautiful tool  perfect to use today or add to a collection. From one of the most renowned makers of artist tools and materials. 
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