Orient Bambino vs Bambino Open Heart

Spec for spec

The fit reads backwards, and that is the useful part

Orient publishes 40.5mm with a 46mm lug-to-lug for the Open Heart. The classic Bambino V4 is 42.5mm with a lug-to-lug around 49mm. So the bigger-sounding watch is the one that overhangs a small wrist, and the Open Heart — nominally only 2mm smaller — sits roughly 3mm shorter across the wrist. Lug-to-lug decides fit; diameter does not, and the sizing guide explains the measurement.

The 38.4mm Bambino is shorter still at 44mm lug-to-lug, which makes it the only one of the three we would put on a 6.25-inch wrist without hesitation. It is on the small-wrist shortlist for exactly that reason.

What you give up for the aperture

Three things, and they are all real:

• The date. The F6T22 has no calendar at all. On a watch intended for an office, that is the single biggest practical loss.
• A published accuracy tolerance. Orient publishes -15/+25 sec/day for the F6724 in the standard Bambino; it publishes no daily rate for the Open Heart reference. You can reasonably expect similar behaviour from the same factory, but the guarantee is not printed. What a tolerance means covers why that matters.
• Dial quiet.The aperture is at 9 o'clock and it is asymmetric. If you want a plain, symmetrical dress dial, the standard Bambino is the one.

One caliber, two names - and we are not going to pick one silently

Orient's own US product page prints the Open Heart's caliber as FT622; the caliber references catalog it as F6T22 (22 jewels, 21,600 beats per hour, hacks and hand-winds). It is one movement with two characters transposed, not two movements, and we state both rather than quietly choosing. Same treatment as every other spec discrepancy on this site - our method page says so in those words.

What is identical across all three

The case architecture, the 30m rating with a push/pull crown, and the domed mineral crystal. Not sapphire — domed mineral, which distorts beautifully and scratches easily. Thirty metres means splashes and hand-washing, not swimming: what each water-resistance rating permits is worth reading before you treat any Bambino as a daily beater, and the crystal guide covers the trade.

All three also run in-house Orient movements that hack and hand-wind — which, at this price, is genuinely unusual. Hacking and hand-winding explained covers why those two features are worth looking for, and how to set an automatic watch covers doing it in the right order.

Which should you buy?

• You want the watch to be noticed → Open Heart. Nothing else this cheap shows you the balance wheel. The open-heart category is ranked separately.
• You need a date → Bambino, either size. Only the F6724 has one.
• Wrist under 6.5 inches → the 38.4mm Bambino, 44mm lug-to-lug.
• You want the full version history → Bambino versions explained decodes V1 through V7 and the reference numbers.
• You want a sapphire dress watch instead → Bambino vs Tissot Le Locle, or the dress shortlist.
• You want an Orient with real water resistance → the AC0Q Diver or the Kamasu - 200m, sapphire, screw-down crown.