Strap for Sport Casual

The Citizen Eco-Drive BM6988-57E features a 22-millimetre lug width (22mm). This measurement is determined by calculating the distance between the two steel lugs where the strap attaches to the case. To verify, position a ruler perpendicular between the attachment points: the exact value is 22mm. Any aftermarket strap must have a lug bar width corresponding to this measurement.

The BM6988-57E pairs excellently with straps in vegetable-tanned leather (calf, suede), featuring medium-to-high durability levels. Alligator leather represents the absolute luxury solution, developing natural patina over time. NATO straps in nylon or cotton transform the model into a tactical-sport version ideal for summer wear. For humid environments or intensive sports, rubber straps in butyl or FKM material guarantee durability without maintenance requirements. Avoid excessively thin leathers (less than 1.4mm) that would not withstand daily use.

The strap is removed using a spring bar tool (a small steel implement with a flat end). Insert the flat tip into the lug's eyelet, press downward to compress the spring of the lug, and release the pin attachment. Repeat on the opposite side. To mount the new strap, align the bar with the case hole, press downward again with the spring bar tool to compress the spring, and insert the pin. Verify that both sides are securely fastened before wearing the watch.

Yes, all straps with a 22-millimetre lug width are fully compatible with the BM6988-57E. Lug width is the only binding parameter. You can choose from any manufacturer producing 22mm straps: leather, fabric, rubber, or steel. The bar (the section inserted into the case lugs) must have an internal width of 22mm to ensure precise fit. Avoid straps with imprecise manufacturing tolerances (±0.5mm) that would result in excessive play.

A quality leather strap (vegetable-tanned calf, 1.5-1.8mm thickness) typically lasts 3-5 years with daily wear and proper maintenance. Longevity depends on factors such as: ambient humidity, frequency of water contact, acidity of perspiration, and maintenance type (cleaning and conditioning). An alligator strap, if properly cared for, can last 8-10 years. Rubber straps have unlimited duration but lose elasticity after 5-7 years. Leather should dry completely after prolonged water contact to prevent mould and deterioration.