Bambino Open Heart

Ref. RA-AG0001S30B

Case diameter: 40.5 mm; Manufacturer spec
Lug-to-lug: 46 mm; Manufacturer spec
Thickness: 12 mm; Manufacturer spec
Lug width: 21 mm; Manufacturer spec

Retail price $315 (US, Oct 2026)

Your wristIdeal fit

Wrist flat: 55.1 mmLug-to-lug: 46 mm

How the Bambino Open Heart wears

Its lugs add only 5.5 mm to the 40.5 mm case, against 7 mm typical across the almanac, so it wears smaller than its diameter suggests.

On our fit model it sits best on wrists from 6.5" to 7.75" (16.5–19.7 cm); below 6.5" the lugs start to reach the edge of the wrist.

At 12 mm thick it is thicker than 81% of the 118 other dress watches we've measured, so expect it to sit tall on the wrist.

Its 21 mm lug width is one of the most common strap sizes; 38 other watches here share it, so aftermarket straps are easy to find.

Will the Bambino Open Heart fit your wrist?

With a 46 mm lug-to-lug, here is how it wears across common wrist sizes. We estimate the flat top of each wrist from its circumference; measure yours for a closer answer in the fit finder.

Wrist	Flat width (est.)	Fit
6"	47.2 mm	Snug, lugs near the edge
6.5"	51.2 mm	Ideal fit
7"	55.1 mm	Ideal fit
7.5"	59.1 mm	Ideal fit
8"	63 mm	Wears small

Specifications

Reference: RA-AG0001S30B
Collection: Bambino
Status: In production
Case material: stainless steel
Crystal: domed mineral
Water resistance: 30 m
Bezel: fixed
Dial: white
Strap / bracelet: leather strap, buckle
Style: Dress

Movement

Caliber: Orient FT622
Type: automatic
Power reserve: 40 hours

Takes 21 mm straps. See other 21 mm watches and straps.

More Bambino references

Watches that wear the same size

Other watches within 1.5 mm of its lug-to-lug.

Same 21 mm lug width

All 21 mm watches

These take the same straps as the Bambino Open Heart.

Sources

orientwatchusa.com/products/ra-ag0001s30b