HTD · Aquatìc SpaceBoy

Strap for HTD Aquatìc SpaceBoy

The HTD Aquatìc SpaceBoy takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

  • 4.8 out of 5 · 269 reviews
  • Ships in 1–3 working days
  • Worldwide shipping
  • 30-day returns
  • 12-month warranty on manufacturing defects
  • Hand-stitched in Milan

Lug width

20mm
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Lug width20 mm
Case diameter39.4 mm
FamilyAquatìc SpaceBoy
MovementMiyota 90S5
Year2026
CaseStainless Steel inossidabile with insert bezel in aluminium black
Water resistance200

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Standard spring bar · length 20 mm · Ø 1.8 mm double flange

HTD Aquatìc SpaceBoy — watch

Your watch with our straps

Aquatìc SpaceBoy with Grand Cavalier Leather Strap Orange
Aquatìc SpaceBoy with Vintage Brown Calfskin Strap — Natural Patina
Aquatìc SpaceBoy with Brown Italian Leather Strap

Calf, Orange

Grand Cavalier Leather Strap Orange

€120

★ 4.9 · 12

1 / 109

Real photos of the strap and the case. No generated images.

What length do I need?

Measure your wrist with a tailor's tape or a piece of string, comfortably snug.

Wrist circumferenceLength (long side / short side)
15.0–16.4 cm120 / 70 mm
16.5–17.8 cm125 / 75 mm
17.9–19.0 cm130 / 80 mm
19.1–20.3 cm135 / 85 mm
20.4–21.6 cm140 / 85 mm
21.7–22.9 cm145 / 90 mm

The ready-to-wear strap is 115 × 75 mm. For a smaller or larger wrist I make it in the right length: order your length.

What I'm asked about the HTD Aquatìc SpaceBoy

What strap size does the HTD Aquatìc SpaceBoy take?

The HTD Aquatìc SpaceBoy needs 20 mm between the lugs. It's the size I've been fitting on it for years.

Can the strap on the HTD Aquatìc SpaceBoy be changed?

Yes. It has spring bars between the lugs: with the right tool the strap comes off in a minute. If you'd rather not risk a scratch, I do it in the workshop.

Can I put a leather strap on the HTD Aquatìc SpaceBoy?

Yes, in 20 mm leather. On a 39.4 mm case a calf strap works every day; if you want something more, alligator.

Which strap do you recommend for the HTD Aquatìc SpaceBoy?

A 20 mm calf strap, for every day. You'll find it ready in the 20 mm collection. If you'd rather have something built on your wrist, the Casati atelier.

More HTD in 20 mm

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

Request an appointment →

Casati Milano · Via XX Settembre 15, Milan · by appointment only

The atelier's website: casatimilano.com

Updated on · by Antonio Zichichi