The Piaget Protocole represents the maison at its most elegant: ultra-refined proportions, precious-metal construction and the distinctive rectangular geometry associated with Piaget’s dress watches. Vintage references such as the Protocole 9154 offer a very different proposition from modern mass-recognised luxury watches—discreet, design-led and increasingly collectible.
This example combines an 18K solid yellow gold case, a striking dark emerald green dial, manual-winding movement and custom diamond setting for a richly jewellery-led interpretation of the vintage Protocole.
The appeal starts with the colour combination. The deep emerald-green dial against solid 18K yellow gold creates an exceptionally rich vintage aesthetic, while the custom-set diamonds on the case introduce additional brilliance and transform the watch into a stronger jewellery statement.
Importantly, the diamonds are custom/aftermarket set and are not represented as original factory Piaget diamond setting—an important distinction for collectors.
Underneath the decorative exterior is a manual-winding mechanical movement, preserving the tactile ritual and character collectors often seek in vintage watches.
Most importantly, the Protocole 9154 is no longer produced today. Finding these older precious-metal Piaget references is dependent on the secondary market, and distinctive configurations such as this dark green example offer something considerably less commonplace than contemporary luxury watches.
PRODUCT INFO:
Brand: Piaget
Model: Protocole
Reference: 9154
Case Material: 18K solid yellow gold (YG)
Dial: Dark emerald green
Movement: Manual-winding mechanical movement
Diamonds: Custom diamond setting on case
Diamond Status: Custom / aftermarket set; not represented as factory Piaget diamond setting
Production Status: Vintage / no longer produced
Collector Notes: Rare vintage Piaget Protocole reference combining precious-metal construction, manual winding and an unusually rich dark green dial
Price: SGD 5,688
This is the kind of vintage Piaget that feels more like jewellery with a mechanical watch hidden inside it. The combination of dark emerald green and solid 18K yellow gold is gorgeous in person—the green is deep and discreet rather than loud, while the custom diamonds give the case significantly more presence.
We also want to be very clear from a collector’s perspective: the diamond setting is custom, not factory Piaget, and the piece should be valued with that distinction in mind.
What makes it compelling is the underlying watch itself: a vintage Protocole 9154 in solid gold with a manual-winding movement, from a design that is no longer produced today. At SGD 5,688, this is for someone who wants a genuinely unusual vintage Piaget rather than another watch everyone else is already wearing.
