 Although the Chiremba Balancing Rocks were retained, other features including latent imaging in which the letters RBZ can be seen when the banknote is tilted horizontally at the eye level and identification marks for the visually impaired were added to the design, and the neck of the Zimbabwe Bird watermark was longer.The $5, $10 and $20 banknotes were also revised with the new designs in 1997, whilst the $2 banknote was and replaced by a coin in the same year with the $5 denomination undergoing the same process in August 2001.The $500 denomination was first issued with red as the main colour in 2001.