Buy or service your watch here: http://www.thewatchbox.com Following a wrist-check of their watches, Tim Mosso and Michael R. Michaels discuss Patek Philippe's system of pull-tab spring bars that permit owners to release their straps without tools or watchmaking experience. Mike demonstrates the system in practice on his Patek Philippe 5139P perpetual calendar in platinum. Tim highlights other brands including F.P. Journe, Chopard, and Jaeger-LeCoultre that have introduced a similar system of pull-tab strap releases. Finally, Tim and Mike discuss the need to protect leather straps of all types from water; a damaged Jaeger-LeCoultre Master Compressor Extreme Lab 2 strap showcases the danger of exposing a fine leather strap to moisture. Video and content by Tim Mosso and Pheline Jerome.