This is a Round with Slot shaped Draw Plate with 31 holes.  The factory number for this shape is SP 487.  The largest hole is 6 mm and the smallest hole is 3 mm.

Our Italian made steel draw plates are made of properly hardened steel for reducing and shaping soft non-ferrous metals like gold, silver, platinum, palladium and copper alloys. Our Italian manufacturer has been producing the best quality steel drawplates in the world for over 40 years using modern machine tools mixed with old world craftsmanship and attention to detail.  Holes are precisely graduated for even and easy to use draw downs.