In the last five years, we have seen an explosion of bronze material in the watch world. Its ability to provide a unique ownership experience through the natural patina of the material has resonated with many collectors. However, despite the love of patina, a large group of collectors want this material to remain stable for a longer period. They value the pure gold lustre of a bronze watch over the appearance of ageing. To keep this group happy, many brands have been playing around with the composition of their bronze alloys. Here are three brands that have been quite successful in slowing down the effect of patina. 
The key to a slow patina is the alloy used for the bronze. Most bronze is a mixture of copper and tin. This results in the lime green patina that many of us are used to. However, the resulting patina changes when this mixture is altered, and the tin is replaced by aluminium and a small amount of iron. It also takes longer to develop.
This is the case with the Tudor Black Bay 58 Bronze. If you’re looking for a bronze diver that utilizes aluminium bronze, it’s probably your best bet. At a reasonable 39mm, with an instant micro-adjustable “T-fit” clasp and a clean, dateless dial, the Black Bay 58 Bronze seems to have all the right specs.
Of course, the “master of materials” RADO would also have a place on this list. They also use aluminium bronze in their bronze replica watches, so they are some good options for those who want to avoid bronze.
For now, their Captain Cook Automatic Chronograph is a worthy bronze option. It comes in 43mm with a blue and bronze NATO strap and also has bronze-colored hardware. Inside, the R650 movement boasts an above-average 59-hour power reserve. Finally, the sunburst blue dial looks great under the boxed sapphire crystal.
Well, before you pass judgment, hear me out. First of all, the green dial of the IWC Spitfire Automatic is highly readable. The A-shaped dial with strong luminescence would look right at home on any aircraft. In addition, the anti-magnetic properties of the bronze, combined with those built into the watch’s 32110 movements, make the Spitfire a good choice in the highly magnetic environment of an aircraft cockpit. Finally, for those of us who don’t like aviation, the golden sheen of the case looks great with the green dial.
