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This watch was conceived during a forum discussion from June 2008. Several designs were put forward before finally deciding on this one and during the discussion it was suggested that this should be a bronze watch. Had it been possible to source the correct grade of bronze at the time, the PRS-30 would have been one of the first bronze watches available. In the event, sourcing a (comparatively) small quantity of bronze proved difficult until a supplier who was prepared to supply it in kilos, rather than tonnes, was located in Switzerland.

One of the main appeals of bronze watches is the way in which the case slowly oxidises and changes colour to a rich chocolate brown, in the same way as bronze works of art patinate. Of course the natural bronze colour can be maintained if preferred by gentle polishing or wiping with a mildly acidic liquid (Coca-Cola is recommended by some). Patination will not initially be uniform across the entire case although this can be accelerated by using any of the methods to be found by conducting a search of the web.

The watch has a 33mm visible dial, which is of two-layer sandwich construction with a dark brown/charcoal dial and SuperLuminova C3 coating on the under-dial showing through the numbers and indices cut-outs. The domed sapphire crystal is 2.2mm thick and has anti-relective coating to the underside. The 12-pointed star crown (unique to this watch) measures 4.5mm high by 7mm across and is signed with the Precista "P" ambigram. The hands are black frame with SuperLuminova C3 filled tips; the end of the seconds hand is also luminous coated.

Thanks to Chris Parker for his design which went forward for production.

The PRS-30 bronze watch is packed in a Peli case and comes with two hand-made leather straps, one signed bronze buckle and is guaranteed for 2 years.

CASE
• Bronze alloy C6300 CuAl10Ni5Fe4, brushed finish with stainless steel back
• Diameter 42mm, 46mm across including crown
• Lug to lug height 49mm
• Thickness 12mm to the top of domed crystal
• Lug spacing 24mm
• Anti-magnetic 4800 A/m
• Water resistance 100m
• Weight 112 grammes with strap and buckle
• Screw back

DIAL
• Semi-matte dark brown/charcoal, sandwich dial construction
• Hour markers SuperLuminova C3
• Date window at 4:30 position

HANDS
• Black frame, luminous tipped
• Luminous: SuperLuminova C3

SAPPHIRE
• 2.2mm domed sapphire, A/R coating underside

MOVEMENT
• ETA 2824-2 "Top" grade 25 jewel automatic running at 28,800 BPH with quickset date and Incabloc
• Swiss Made

STRAP
• Hand-made thick leather (very soft) one black and one brown and one signed bronze buckle

Country of Origin: Germany

Precista

PRECISTA BRONZE PRS-30

PRECISTA PRS-45 AEROTIMER