Up for sale is a stunning and uniquely complicated iteration of a modern icon: the Cartier Ballon Bleu Moonphase (Ref. WSBB0020). While standard Ballon Bleu models are a staple of elegant design, this 37mm variant introduces a poetic celestial complication that perfectly balances the dial layout. The moonphase is one of my favorite watch complications.

At 37mm, this piece sits in the absolute sweet spot for a luxury dress watch—offering an incredible, fluid wrist presence thanks to its pebble-like, fully polished case profile and the signature integrated crown guard with a synthetic blue cabochon spinel. The silver guilloché dial catches the light beautifully, providing a timeless backdrop for the crisp black Roman numerals, blued-steel sword hands, and the deep blue moonphase indicator at 9 o'clock.

Key Specs:

Case Material: Polished Stainless Steel Diameter: 37mm (13mm thickness, wears incredibly smooth on the wrist) Movement: Cartier Caliber 080 MC Automatic (Self-winding mechanical) Dial: Silver flinqué/guilloché with painted Roman numerals and blued-steel hands Complication: Moonphase indicator at 9 o'clock Strap: Black alligator leather strap on a stainless steel with a double-adjustable folding deployment buckle Condition & Scope:

Condition: Great, collector-maintained condition. The fully polished case has been meticulously cared for, showing only minimal signs of careful wear. The sapphire crystal is flawless, and the automatic movement is running beautifully, keeping excellent time. Content: Full kit with original Cartier outer box, inner presentation box, and warranty card. Price: $4,500 (MSRP was $9,000 on this one, and current Chrono24 listings are above this price) Shipping: Fully insured shipping within the CONUS at actual cost or meet-up in Salt Lake City is no charge.

Email me at wastachwatch801@gmail.com for additional photos, specific angles, or references. You can also check us out at wasatchwatch.com. Serious inquiries only.