The Zenith G.F.J. 40.1865.0135/51.M0135 is a special timepiece limited to just 160 units, marking the brand's 160th anniversary and elegantly paired with a platinum bracelet. Encased in platinum, the watch features a 39 mm round design with a stepped bezel and gracefully curved lugs. Both sides are protected by sapphire crystals, and it boasts water resistance of up to 5 ATM.

The intricate dial is designed in three segments, showcasing a guilloché patterned center with a brick motif, complemented by sections in lapis lazuli and mother-of-pearl. It accurately displays hours, minutes, and small seconds, with each section utilizing distinct materials and finishes. Inside, the timepiece is powered by a manual-winding calibre 135, operating at a frequency of 2.5 Hz. This movement features an oversized balance with adjustment screws, a Breguet overcoil, and a double-arrow regulator, along with a stop-seconds function. It offers a power reserve of approximately 72 hours. Uniquely, this model comes with an integrated platinum bracelet, as opposed to the leather straps found on other G.F.J. variations.