Mercantile Bank of India, colour trial $25, undated (c.1912), orange and green, boats and buildings on a river at left in oval frame, value in green underprint low centre, value at each corner, printed signature low right, rev. green, head of Mercury at centre (Ma M9), blue WATERLOW seal low centre, red SPECIMEN overprint, official perforations, good extremely fine, most attractive, excessively rare