Zoom icon Click to expand Tap to zoom Chevron down icon Chevron down icon Regula 07 Time Side by Regula Sale $12.00 | / SKU 72-580 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 Regula 07 Time Side Clock Chain Wheel. It has a diameter of 33.2 mm.