The sculpture was created by the artist Fernando Pugliese, and appears like bronze but is actually made of a synthetic material commonly used in the shipbuilding industry. This special polymer can withstand the rigors of the weather and can receive a special patina that makes them appear like bronze.
Photo credit: Waymarking
Nearly 40,000 yellow-roofed taxis run in the Argentinian capital, providing employment to 70,000 drivers and as many families. The official taxi service has existed in Buenos Aires since 1902. For a long time, taxis could be painted in any color and identified only by the "flag" of the clock, which bore the word "free" in white letters on a red background. Then a rule was introduced in 1967 requiring they be painted in yellow and black.
Also see: Bangkok’s Multi-Colored Taxis
Photo credit: Waymarking
Photo credit: Raúl Alejandro Rodríguez/Flickr
Photo credit: Waymarking
Sources: www.clarin.com / Waymarking