amsterdamvintagewatches.com
-> Singel 416 (right by the flower market and the purple flowers in your picture), or visit Schaap en Citroen (AD for all the big brands) at PC Hooftstraat 40 (just a street away from the Rijksmuseum). The last street comes with a Gassan and a Tiffany's boutique as well. If all else fails Schiphol airport has a Gassan shop as well
Enjoy!