The Octa Réserve de Marche represents F.P. Journe's approach to extended power reserve complications within the Octa series. This reference-octa-reserve model focuses on displaying the movement's substantial 120-hour power reserve capability, positioning it as a practical complication piece within the manufacture's collection. The 40mm case is crafted in 18k rose gold with a fixed bezel and sapphire crystal. The automatic caliber 1300 movement powers the silver dial configuration, while water resistance extends to 30 meters. The watch is completed with a leather strap, reflecting the dress watch orientation of the piece. This reference appeals to collectors seeking F.P. Journe's independent watchmaking approach combined with extended power reserve functionality. The 120-hour power reserve distinguishes this model within the Octa series, making it suitable for collectors who value practical complications alongside manufacture movements. Production commenced in 2003, establishing this reference within the brand's contemporary catalog offerings.