Strap for PrimaLuna Quartz 23 Diamond MOP

The lug width of the Longines PrimaLuna L8.109.0.87.6 measures precisely 6 millimetres. This dimension is critical for selecting a compatible strap and should be measured using a digital calliper or precision ruler placed across the external surfaces of both lugs, not within the case attachments. A 6mm strap will fit perfectly without gaps or tension.

Alligator leather stands as the preferred choice for the PrimaLuna: its distinctive geometric grain harmonises superbly with the rigorous proportions of the 23mm case. Additional premium options include shell cordovan for those pursuing the highest qualitative standard, smooth polished calf leather for simplified maintenance, and vegetable-tanned leather for those valuing sustainability and natural patina development. Recommended colour palettes are taupe brown, cognac, polished black, and burgundy.

Strap replacement requires a specialised tool called a spring bar removal tool: a precision tweezers-like instrument that carefully extracts the elastic pins anchoring the strap to the case lugs. Position your watch on a soft surface to prevent scratching, gently insert the tool tip into the designated slot of the spring bar, and apply light pressure until the pin compresses. The strap then disengages smoothly. The procedure demands patience and precision, particularly important on refined watches such as the PrimaLuna.

Yes, any strap manufactured with 6-millimetre attachments is mechanically compatible with the Longines PrimaLuna L8.109.0.87.6, regardless of manufacturer. However, artisanal leather straps of certified quality are strongly advisable over mass-produced alternatives: material excellence, precision stitching, and lug finish details significantly influence aesthetic experience and longevity. Straps crafted from premium leather with manual execution preserve the proportional balance and elegance the Longines design demands.

Leather strap durability depends upon material selection, daily wear intensity, and maintenance discipline. Premium alligator or shell cordovan, with ordinary care (drying after perspiration, protection from prolonged humidity), typically lasts 4 to 7 years under daily use conditions. Smooth calf leather tends to wear more quickly, approximately 3 to 5 years, whilst vegetable-tanned leather can exceed 10 years, developing increasingly distinctive patina. The case lugs and spring bars remain unaffected: it is the strap itself that requires replacement, thus permitting stylistic variations and maintaining aesthetic freshness for your timepiece.