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Longines Watch Straps
Replacement straps for the Longines HydroConquest and Conquest: water-ready rubber for the dive and sport models, with a secure buckle and the correct width for each case. A practical upgrade for everyday wear that keeps your watch comfortable in heat, sweat and water.
Fitment by model
HydroConquest (L3.781, L3.741, L3.782) – 21mm
Conquest – usually 20mm to 22mm depending on case size
Longines uses some less common widths such as 21mm, so please check the width stamped on your current strap or measure between the lugs.
Which strap for which use?
Rubber is the natural choice for the HydroConquest: it rinses clean after the sea or pool and doesn’t absorb sweat. For the office, a leather strap in the same width gives the Conquest a dressier look.
Frequently asked questions
What size strap does a HydroConquest take? The models listed above take 21mm.
Will a 20mm or 22mm strap fit instead? Not properly – use the exact width for a secure, gap-free fit.
Can I fit it myself? Yes – spring-bar straps swap in a few minutes.
New to sizing? Read our lug width guide by model, or browse all rubber straps.