Perrelet watch turbine gmt a10921 since it was first launched in 2009 the perrelet turbine watch has been recognised as one of the brands most distinguishing designs now developing further on this innovation they have revealed the perrelet turbine gmt watch collection a propeller style finish combined with a gmt hand and a subtle world map engraved under dial the 44mm brushed and polished stainless steel case of this perrelet turbine gmt watch houses the p 401 automatic movement that