Specht & Söhne SP00031 Jump Hour Automatic Watch — ST1721, Barrel Case, Curved Minutes

Specht & Söhne SP00031 Jump Hour Automatic Watch — ST1721, Barrel Case, Curved Minutes

The Specht & Söhne SP00031 is a Seagull ST1721 automatic jump hour watch in a barrel (wine-barrel inspired) case — 34.5mm × 45mm, 10.4mm thickness. Instead of traditional hands, the dial uses two display zones: a jump hour window near 12 o’clock showing the current hour, and a curved minute arc scale near 6 o’clock showing the minutes. No hour hand. No minute hand. Sunburst dial surface, sapphire crystal, screw-down crown, ribbed rubber strap with butterfly buckle, 5ATM water resistance. Four colour variants: green, black, red and red-black.

Crown setting: Same as SP0032 — the ST1721 must be set clockwise only. Counter-clockwise crown rotation damages the jump hour mechanism.

Key Specifications

Variants — Four Configurations

Green: Green sunburst dial with matching or contrasting rubber strap — the most distinctive and contemporary colour.

Black: Dark dial with understated character — the most versatile for daily wear.

Red: Red dial with contrasting strap — the highest contrast and most assertive combination.

Red-black: Red and black combination — confirm the specific dial/strap pairing from the product listing images.

SP00031 vs SP0032 — Two Jump Hour Watches

Both use the Seagull ST1721 automatic jump hour caliber at 10.4mm. The differences:

Choose SP00031 for the barrel case, no-hands display, rubber strap and bold colours. Choose SP0032 for the conventional round case, central minute hand and leather strap.

Both have the same jump hour mechanism and the same clockwise-only setting requirement.

Handless Display — Jump Hour + Curved Minute Arc

The SP00031 uses no traditional hands at all — it is a fully digital-style analog display:

Jump hour window at 12 o’clock: The current hour appears as a numeral in the aperture and changes instantaneously at the top of each hour. Identical mechanism to the SP0032 — spring-loaded disc, stationary for 59 minutes, instant advance at the 60th.

Curved minute arc near 6 o’clock: The minutes are shown on a curved arc or scale — a pointer or indicator advances along a numbered arc from 0 to 60. This is a “retrograde” or “jumping minute” display — the indicator sweeps along the arc and at 60 minutes flies back to 0 as the jump hour advances.

The combination creates a completely hands-free time display. Reading time: look at the number in the top window for the hour; look at the arc indicator’s position for the minutes. Both displays are deliberately placed — the hour at 12 and the minutes at 6 create a vertically balanced dial layout.

Barrel Case

The barrel (wine-barrel or tonneau-inspired) case at 34.5mm × 45mm creates a specific wrist character different from both round and rectangular cases. The 34.5mm width is narrow; the 45mm height creates the long axis. On the wrist the barrel sits with the long axis running across the wrist rather than along it — the 45mm dimension spans the wrist width, the 34.5mm sits more compactly from 6 to 12.

The polished and brushed surfaces of the barrel case create faceted light interaction at the curved case sides — different from the flat faces of a rectangular case.

Rubber Strap

The ribbed rubber strap creates a different character from the leather-strap SP0032 — casual, sports-adjacent, suitable for daily active wear. The butterfly buckle provides secure closure. For buyers who want the jump hour complication without the formality of a leather strap, the SP00031’s rubber strap is the correct choice.

Setting the Time

1. Unscrew the screw-down crown.
2. Pull to time-setting position.
3. Rotate clockwise only to advance the displays.
4. Re-screw crown firmly.

Never rotate counter-clockwise when setting. The ST1721’s jump hour mechanism is directionally sensitive.

Who Is the Specht & Söhne SP00031 For?

The SP00031 is built for:

• Handless display buyers who want both jump hour and curved minute arc — no traditional hands at all on the dial
• Barrel case buyers who want the wine-barrel inspired shape on a mechanical jump hour at this price
• Rubber strap jump hour buyers who want the casual/sporty character rather than the SP0032’s leather strap formality
• Green or red colour buyers who want the bold colourways on an unusual mechanical display

How It Compares

vs. Specht & Söhne SP0032 — See comparison table above. Same ST1721 movement, different case, minute display and strap.

vs. Farasute NL007B-1 Jump Hour — Farasute uses standard Seagull automatic with jump hour module at 38mm round on leather. SP00031 uses dedicated ST1721 at 34.5×45mm barrel on rubber with handless display.

vs. Farasute 2260B Tonneau Jump Hour — Both are non-round jump hour automatics. The 2260B is Seagull ST17 at 36mm tonneau with central minute hand on leather. The SP00031 is ST1721 at 34.5×45mm barrel with curved minute arc on rubber — more unusual display and sport character.

More from Jewelry Addicts

• Specht & Söhne SP0032 Jump Hour — round case ST1721 jump hour with leather strap
• Specht & Söhne Collection — all S&S models
• Farasute NL007B-1 Jump Hour — Farasute jump hour range
• Farasute 2260B Tonneau Jump Hour — tonneau jump hour alternative
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