Ostrich Strap for the Seiko SPB377
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The Seiko SPB377 wears on the larger side, and its case takes a longer strap than the standard cut. This build is a dark brown ostrich leg strap with creamy-white stitching, cut 85/135 mm at an 18 mm buckle. The owner sized between the calculator's range and their measured wrist, so we split the difference.
Strap specifications
| Leather | Dark brown ostrich leg |
|---|---|
| Watch | Seiko SPB377 |
| Strap length | 85/135 mm |
| Buckle width | 18 mm |
| Buckle | Curved style, stainless steel |
| Stitching | Creamy white |
| Tip shape | Tapered |
Why these choices
Ostrich leg leather gives the strap a natural grain and a warm dark brown that pairs with the SPB377's dial and steel case. The creamy-white stitching lifts the brown a little without going to a bright contrast, so it stays smart.
We cut the strap 85/135 mm because the owner's wrist sat between the calculator's 8 to 9 inch suggestion and a measured 7.8 to 8 inches; the longer split keeps the case centered with room to spare rather than pulling to the last hole.
A curved buckle style follows the wrist, and regular spring bars keep the fit simple. The tapered tip finishes it cleanly under the keeper.
FAQ
What size strap fits the Seiko SPB377?
An ostrich strap for the Seiko SPB377 should be cut to your measured wrist; this one went 85/135 mm for a wrist around 8 inches, which centers the case without a long tail.
Why creamy-white stitching on dark brown?
It adds a soft line that defines the strap edge while keeping the look warm rather than sporty; we can match or contrast the thread on request.
Each strap is made to order, so allow two to three weeks to delivery. See this dark brown ostrich leg strap, or browse our ostrich watch straps, brown leather watch straps, and the full custom leather watch straps range.