Zenith Chronomaster El Primero Full Open 38mm 03.2153.400/78.M2150

SKU: 6918049

£5,220 (40% Off) £8,700

With a rich history dating back to 1865, Zenith have created many timepieces that have become iconic in Swiss watchmaking. One of the outstanding achievements was the invention of the first integrated automatic chronograph movement; the Zenith Chronomaster. Still the most precise series-made calibre to this day.

The Zenith Chronomaster El Primero Full Open has the originally designed, 1969 case, sized at a modernised 38mm and crafted from polished and brushed stainless-steel.

The new open dial, reveals the legendary beating heart of the El Primero movement, Silicon escape-wheel and lever. Three integrated sub dials are present on the dial with a 30-minute counter at 3 o’clock, a 12-hour counter at 6 o’clock and a small seconds counter at 9 o'clock. A handy date indication can also be found at 4:30.

A single chronograph hand with a red tip is positioned centrally while the hour and minute hands are coated with SuperLuminova, as are the index hour markers.

Finally, the Zentih Chronomaster El Primero Full Open is adorned by the lustrous stainless steel bracelet for a seamless, professional finish.

A transparent sapphire crystal case back, reveals the El Primero 400 Automatic movement, with an impressive 50-hour power reserve.

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There are usually three standard size measurements; UK, US and European. You can find a conversion chart across all three measurements in our full guide.


The average size for a ladies bracelet is 20cm. Children's bracelets are usually 16cm. If the plan is to add charms then the bracelet should probably be one size up on your normal.

Read our full size guide.

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Orders placed before 5pm, Sunday to Thursday, will be dispatched the following day*. Orders sent by Special Delivery should arrive the following day from dispatch**.

FREE delivery for all orders over £25, FREE Special Delivery for all orders over £100. All sent signed for through the Royal Mail.

We also offer a simple returns process.

Please see our full Delivery details and also check our Returns details.

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