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The Bambino Open Heart puts Orient's F6724 balance wheel on display through a heart-shaped aperture cut into an otherwise conservative dial. It is one of the most affordable ways to own a genuine in-house automatic with a finishing detail that would cost three times the price anywhere else. Clean proportions, honest specs, real movement credentials.
Orient has made its own movements in Japan since 1950, and the Bambino line has been the entry point to that tradition for decades. The V5 generation, introduced around 2018, refined the case proportions to 40mm and updated the dial finishing across the lineup. The Open Heart variant was added to give collectors a mechanical spectacle without abandoning the Bambino's dress-watch restraint.
The heart-shaped aperture is a deliberate nod to high horology's skeleton tradition, executed at a price that makes it accessible rather than aspirational. The F6724 inside is the same family of movement Orient has been developing and manufacturing in-house at its Higashimurayama factory for years.
The heart aperture adds visual interest but also collects dust and lint more readily than a closed dial; inspect used examples carefully under a loupe. Some buyers find the aperture placement slightly off-center relative to the dial symmetry, which is a matter of taste but worth seeing in person before buying. The F6724 hacks but does not hand-wind, which is a minor inconvenience if the watch has sat unworn and the power reserve is depleted.
Water resistance is a modest 30m, so this is a dress watch only; do not wear it near water. Lume on the Open Heart variants is minimal and largely decorative given the dress context.
New examples trade in the $200 to $280 range depending on dial color and retailer. Used pieces in good condition rarely drop below $150 because demand for affordable in-house automatics stays steady. The Open Heart carries a small premium over the standard Bambino V5 closed-dial versions, typically $30 to $50.
This is a watch that holds its value well for the segment without being a serious appreciating asset.
The Orient F6724 caliber is a Japanese-made movement with readily available service parts and a straightforward 3Hz (21,600 vph) architecture that any competent watchmaker can service. Orient's manufacturer service interval is around 3 to 5 years, though many collectors stretch this to 5 to 7 years in normal use. Independent watchmakers familiar with Japanese movements are a good choice and typically charge less than sending it to Orient's US service center.
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Open-heart aperture must reveal an oscillating balance wheel; a solid dial at the aperture position is a non-genuine or incorrect dial.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| dial | Heart aperture and balance wheel | Open aperture at 9 revealing the oscillating balance wheel; balance wheel visibly moving | Solid dial at aperture position; non-genuine dial or wrong Bambino variant |
| caseback | F6724 Orient architecture | Orient F6724 in-house movement through caseback | Non-Orient architecture; movement swap |
| dial | Bambino dial text | Orient branding in correct font; correct Bambino color variant description | Incorrect font or wrong color variant described |
