The Zenith El Primero Chronomaster is the epitome of high-end watchmaking: a full calendar (day, month), date, moon phase, and chronograph in a single case. The version with a silver guilloché dial gives this elegant watch a classic look that contrasts with the dynamic character of the El Primero movement. The transparent caseback reveals the interior of the movement, bearing the Manufacture Le Locle signature—a perfect blend of form and function. Collector's Note: The El Primero Chronomaster 02.0240.410 is one of the most sought-after versions of the El Primero, combining the legendary movement with a full calendar and moonphase—a major engineering feat. Many enthusiasts consider this variant to be one of the most complete and versatile versions of the El Primero. The transparent caseback with factory inscriptions demonstrates Zenith's pride in its own production (Manufacture Le Locle) and highlights the movement's "in-house" character. Specification: - Brand: Zenith, - Model: El Primero Chronograph Chronometer Triple Date Moon Phase, - Reference number: 02 0240 410, - Movement: * automatic, * calibre 410/2, * 31 jewels, - Case: stainless steel, the watch's transparent caseback reveals the Swiss automatic movement, signed: Modele Depose, Zenith, Chronomaster Swiss Made, Manufacture Le Locle, - Diameter: 40 mm (42 x 46 mm case with lugs and crown) and height 13 mm, - Dial: * silver guilloche dial, * silvered Roman numerals and black Arabic, * three subdials at 3, 6 and 9 o'clock, moon phase at 6 o'clock, * date window between 4 and 5 o'clock, * month window at 2 o'clock, * day of the week name window at 10 o'clock, * signed: Zenith, El Primero, Chronometre, Tachymetre, Swiss Made, - Hands: black sword hands, - Crown: original, Zenith mark, monopushers, - Glass: sapphire glass, - Buckle: original, double folding, signed Zenith, - Bracelet: original, stainless steel, size spprox. 18,5 cm, - Gender: men's watch, - No manufactory box and documents. Sorry no box. We recommend that you view all photos prior to purchasing to ensure you are satisfied with the condition of the items. We also want to be able to provide all our customers with high-quality antique and vintage items, regardless of their budget. Just decide how much you want to spend. Please look at the pictures, they say more than 1000 words. POSITIVE AWARENESS: Purchasing this item extends its lifespan and reduces the environmental impact of using new resources. You can be sure that you are making a better choice for the Planet. SHIPMENTS: All shipments have a tracking number and are fully insured. The delivery time depends on the courier companies in the recipient's country. Items will be shipped registered and insured. Delivery via shipping company can take up to two weeks. IMPORTANT: If the winning bidder decides to cancel/withdraw the bid, they bear the risk, all shipping costs and refund of the seller's import duties. Import duties, taxes or other additional charges will be charged by your local customs. We are not responsible for any duties and taxes imposed on your order. All charges imposed during or after shipment are the responsibility of the customer (tariffs, taxes, etc.). Ask for details of import duties or taxes at your country's customs office immediately prior to ordering. PLEASE UNDERSTAND: The actual color of the items may be slightly different from what you see in the pictures due to monitor or computer specifications. LAST AND MOST IMPORTANT: If you have any problem, please contact us. Your satisfaction is important to us. M10/C12