Depicts the country name over the value and date below. The latent image at the centre with the initials "BRC" (Central Bank of Colombia) or "MIL" (thousand), depending on the angle of view. Microtext at the bottom "Taking care of the water" (repeated consecutively, alternatingly upright and inverted).

Depicts a loggerhead turtle entering the water. The water is depicted by a series of undulating lines engraved at different depths. These are on a background of straight lines in which the word ‘agua’ (water) is repeated in microtext, every other word being inverted.

The loggerhead sea turtle (Caretta caretta), is a species of oceanic turtle distributed throughout the world. The average loggerhead measures around 90 cm (35 in) in carapace length when fully grown. The adult loggerhead sea turtle weighs approximately 135 kg (298 lb), with the largest specimens weighing in at more than 450 kg (1,000 lb). The skin ranges from yellow to brown in colour, and the shell is typically reddish-brown.