The Parmigiani Fleurier Tonda PF 36 Automatic Stone Blue, reference PFC804-1020005-100182, is a time-only sports watch with an integrated bracelet. The case is stainless steel, 36 mm in diameter and 8.6 mm thick, with polished and satin finishes and a knurled bezel in 950 platinum. Water resistance is 10 bar (100 m) and the crown screws down. The Stone Blue dial carries a hand-guilloché Grain d’Orge (barleycorn) pattern, hand-applied rhodium-plated 18k gold indices and skeletonised delta-shaped hands, with no date window. A sapphire caseback shows the in-house calibre PF770, a self-winding movement with 29 jewels and 179 components, running at 28,800 vph (4 Hz) with a power reserve of about 60 hours. Its partly skeletonised oscillating weight is made of 22k rose gold.

Parmigiani Fleurier introduced this model in March 2025, one month after the 40 mm Tonda PF Micro-Rotor Platinum Stone Blue. The 36 mm version moves the same dial colour into a steel case while keeping the platinum bezel. According to the brand, the shade draws on the colour palette of the architect Le Corbusier. Worn and Wound reviewed the 36 mm Tonda PF Automatic in early 2023, and the size is also offered in two-tone and rose gold. The steel bracelet is integrated into the case, matches its polished and satin finishes, and closes with a folding clasp. Launch prices were USD 22,600 and CHF 21,000. Time and Watches reported EUR 21,000, and Webchronos reported JPY 3,454,000 including tax.

Coverage of the Stone Blue was mostly launch reporting. WristReview called it classy and restrained. Acquire preferred the 36 mm size to the 40 mm version. Hands-on reviews of the 36 mm case in other dials focused on proportions. Worn and Wound found that the integrated bracelet makes it wear larger than its diameter and described the 8.6 mm height as very comfortable. Fratello measured 36.1 mm across and 41 mm lug to lug, and praised the fit, the absence of a date and the PF770 finishing. Fratello also called the price steep for a steel sports watch and missed the micro-rotor movement of the 40 mm model. As of October 2026 the Stone Blue remains a regular production model sold through Parmigiani Fleurier boutiques and authorised retailers.