Curved-End Strap for the Longines HydroConquest
The Longines HydroConquest is a 41 mm dive watch, and a straight strap leaves a gap where its lugs turn down toward the wrist. This one was made to order as a curved-end crocodile strap — cut on an arc to meet the case cleanly and sized to the owner's 21 mm lugs with a 21-to-18 mm taper.
Strap specifications
| Leather | Black crocodile, matte finish |
| Fitment | Curved end, shaped to the lug |
| Lug width | 21 mm |
| Length | 75 / 125 mm (about 3" / 4.9") |
| Taper | 21 → 18 mm |
| Buckle | 18 mm stainless butterfly deployant |
| Spring bars | Quick release |
| Stitching & edge | Black |
Why these choices
A curved-end strap is the fix when a watch's lugs curve down toward the wrist and a straight strap floats above the gap. The end is cut on an arc to follow that line, so the leather sits tight against the case instead of leaving daylight under the lugs. We cut this one specifically to the HydroConquest, then matched the owner's measured 21 mm lug width.
Matte black crocodile keeps a dive watch looking purposeful rather than flashy — the scales give texture up close, but black stitching and black edge paint keep the whole strap reading as one dark piece. Crocodile also softens with wear and takes a hand-rubbed patina, so it ages into the watch.
The 21-to-18 mm taper feeds into an 18 mm stainless butterfly deployant, and quick-release spring bars let the owner pull the strap without a tool. We ship curved spring bars in the chosen size, though we recommend reusing the watch's original bars for the most secure hold.
★★★★★
“I'd go so far as to say better than the original Alligator strap provided by Longines and massively less expensive. The quick release is also very good.”
Lee G. · Verified purchase · Crocodile strap for a Longines
FAQ
Can you make a curved-end strap for a Longines HydroConquest? Yes. We cut the end on an arc to follow the case and size it to your measured lug width, so the leather meets the HydroConquest without the gap a straight strap leaves.
Do you match the lug width and taper? We do. This strap was built to a 21 mm lug with a 21-to-18 mm taper into the deployant. Send your lug width and we will cut to it.
Most HydroConquest divers are 21mm; some smaller cases are 19mm. Both are standard sizes for us, at no upcharge — see the lug width for every Longines line on our Longines watch straps page.
See more crocodile watch straps or start a custom curved-end strap for your watch. Prefer a different color? Browse black leather straps. Made to order in 3–5 days; allow 2–3 weeks to delivery.