Call of the Wild 

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Caliber: 4R36
Vibrations: 21,600 vibrations per hour (6 beats per second) Power reserve: 41 hours
Number of jewels: 24

Specifications
Stainless steel case (SRPF17, SRPF19, SRPF21, SRPF23)
Stainless steel case with yellow gold color plating (SRPF24)
Stainless steel case with black hard-coating and yellow gold color plating (SRPF20) Canvas and calf strap (SRPF19, SRPF20)
Calf strap (SRPF17, SRPF21)
Nylon strap (SRPF23, SRPF24)
Hardlex crystal
See-through screw case back
Diameter: 42.5mm, Thickness: 13.4mm
Water resistance: 10 bar
Magnetic resistance: 4,800 A/m
Limited editions of 9,999 each