Zoom icon Click to expand Tap to zoom Chevron down icon Chevron down icon Transmission Gear Regula 70 by Regula Sale $5.60 | / SKU 72-5883 1 2 3 4 5 6 7 8 9 10+ Quantity Chevron down icon Quantity Add to cart Spinner icon Notify me when back in stock Email address Email me when available Transmission Gear Regula 70, coin gear style , has a diameter of 17 mm.