This is an Aurora Sole Aurea Minima Limited Edition piston fill fountain pen, released in 2006. The 4 1/2 inch mini size Sole Aurea Minima, an edition of 750 fountain pens, is made from the same bright yellow marbled Auroloide as the Optima sized Sole released 10 years earlier. The design incorporates the same shape and gold plated fittings as the larger pen from the cap top, distinctive ball clip and barrel shape, with the only notable difference being the truncated ink-view window. It has an 18 karat gold nib hallmarked "18K" over "AURORA" and made in extra fine, fine, medium and broad grades. The fountain pen, model 095M, sold for $475.00, matching capped rollerball pen, model 097M, $350.00, matching ballpoint pen, model 096M, $275.00, and matching sketch pencil, model 098M, $350.00.