Strap for Senator Diary Stainless Steel / Black / Alligator / Folding

The lug width of the Glashütte Original Senator 100-13-02-02-50 is 20 millimetres. This dimension denotes the precise distance between the two metal mounting lugs affixed to the case: any compatible strap must respect this specification to ensure secure attachment and correct aesthetic alignment without unwanted play.

The optimal choice depends on intended use and personal preference. For formal context, an alligator strap in black or cognac brown represents aesthetic excellence; vegetable-tanned calf leather offers suppleness and natural patination over time; a cotton NATO provides rapid colour variation; structured FKM rubber combines elegance with contemporary practicality. Milano Straps supplies bespoke solutions for every interpretation.

The procedure requires a specific tool called a spring bar removal tool. Position the instrument beneath the lug from the case, gently push to compress the spring bar, and lever outward until the lug eye releases from the case. Repeat at the opposite end. For the new strap, insert the lug eye into the compressed spring bar and let the lug seat into its housing. If uncertain, Casati Milano offers in-atelier strap change service.

Technically yes, provided the strap adheres strictly to a 20mm lug width specification. However, to preserve the aesthetic and constructive value of a watch of this calibre, a carefully selected artisanal strap is recommended, crafted from certified quality leather and finished to standards coherent with the timepiece's philosophy. Milano Straps supplies bespoke 20mm straps engineered specifically for this case.

A premium leather strap (alligator, calf, shell cordovan) under occasional use maintains functionality for 3–5 years, with potential clasp regeneration. With intensive daily wear, lifespan reduces to 2–3 years. Natural leather undergoes accelerated deterioration through perspiration, humidity, and solar exposure. Milano Straps recommends rotating among multiple straps and periodic maintenance with specialist cleaners to preserve material vitality.