Strap for Corso

The Citizen Eco-Drive BU2070-12L features a lug width of 23 millimetres. This measurement, taken from the inner edge of one lug to the inner edge of the opposite lug, determines which watch strap is compatible with the timepiece. Any strap with a 23mm lug width will fit the watch lugs perfectly. To verify compatibility, use a digital calliper or millimetre ruler, positioning the measuring tool perpendicular to the lugs.

The choice of strap depends on usage context and aesthetic preferences. For formal and daily wear, an alligator strap with vegetable tanning in dark brown creates a sophisticated balance with the 44mm stainless steel case. For sports use, a NATO strap in cotton or Cordura nylon ensures practicality and durability. If you prefer an elegant yet long-lasting alternative, vulcanised FKM rubber offers water resistance and ageing resistance without aesthetic compromise. Italian suede represents the ideal compromise between elegance and everyday versatility.

Changing the strap is a straightforward operation requiring no specialist tools. Place the watch on a soft surface (microfibre cloth). Identify the spring bars securing the current strap to the lugs. Using a strap removal tool (a small plastic or metal lever) or a small flat implement, gently apply pressure to the spring bars to release them. Once the strap is free, insert the new 23mm strap by aligning it with the lugs and press the spring bar until you hear a slight click. Ensure the strap is perfectly positioned and the spring bar is completely inserted.

Yes, any strap with a 23mm lug width is compatible with the BU2070-12L, regardless of brand. High-quality aftermarket straps (thread-dyed leather, NATO, FKM rubber, alligator) fit perfectly on the case's standard lugs. Simply ensure the width is exactly 23 millimetres. Aftermarket straps often offer greater aesthetic variety and superior materials compared to OEM straps, allowing you to fully personalise the character of your watch.

The lifespan of a leather strap depends on the tanning method, material quality, and intensity of use. An alligator strap with vegetable tanning, worn daily, maintains structural integrity for between 4 and 6 years whilst developing an ageing patina that increases its character. A calf leather strap subjected to intensive use and frequent freshwater contact has a lifespan of 2–3 years. Italian suede tends to wear more rapidly (18–24 months) at exposed edges. To extend lifespan, avoid prolonged exposure to freshwater, keep the strap dry after use, and occasionally apply a UV protectant. Vegetable tanning ages better than chrome tanning, developing a deep patina over time.