Omega Seamaster Chronostop | 145.007 | steel

Ref. 145.007

Regular price


Released in 1966, alongside the significantly more expensive Omega Speedmaster, the Seamaster ‘Chronostop’ was designed to attract a more contemporary-minded buyer. Considered an expensive luxury purchase at the time, the Chronostop has since become one of the most affordable, high-quality vintage watches for collectors today. This example, the Ref. ST145.007, was purchased on the 20th November 1971 and comes as a full-set, with both its inner and outer boxes and accompanying paperwork.

When the Seamaster Chronostop launched, the watch was afforded many of the same technical innovations and refinements as Omega’s top-of-the-line sports watches, carrying Omega’s manual-winding, calibre 865 at its heart. Based upon a Lemania ebauche, and beating at 21,600 A/h, this 17-jewel movement was derived from the famed calibre 861 (used in the Omega Speedmaster), yet the calibre 865 was only ever used in the Chronostop. With its extreme accuracy, shock-resistance and internal anti-magnetic protection (owing to its Incabloc shock absorber and and mono-metallic balance respectively), the calibre 865 was an excellent addition.

The Seamaster Chronostop is a unique type of chronograph - similar to that of a fly-back, using a single pusher to operate the stopwatch function. Pressing the pusher once starts the chronograph seconds-hand. Pressing again, and keeping the pusher depressed, stops the hand and holds it in place. Releasing the pusher then resets the chronograph seconds hand back to zero.

One of Omega’s largest vintage models, the Seamaster Chronostop has a tonneau shape case measuring 41mm (excluding the crown and pusher). This elegant, tonneau form and deeply- polished bevelling allow the watch to wear comfortably and discretely on the wrist. The top of the case displays a brushed, “sun-burst” surface, seen in many examples from late 60’s and 70’s and seldom seen today. The reverse of the watch is polished, with a screw-down case back bearing the engraved Hippocampus, found on many Omega watches. The Omega hallmark, 'WATERPROOF' and ‘TESTED 120M' are also visible.

Beneath the raised Omega box-crystal (with an Omega hallmark etched in the centre), the matte-black dial of this Ref. ST145.007 demonstrates sporting intentions, with a fixed inner-tachymeter allowing the user to measure the speed of a travelling object, over a fixed distance. Within the tachymeter is a contrasting, off-white, chapter-ring, with black markers for minutes and chronograph seconds. The dial is faceted, with applied polished-steel indexes, while “OMEGA CHRONOSTOP” and “SEAMASTER” are printed in white at 12 and 6 o’clock respectively. The luminous baton hands are white, offering maximum legibility, with an orange chronograph seconds hand, matching the colour of the Omega logo on the dial.

This full-set, Omega Chronostop ST145.007 comes fitted with a grey suede strap and steel tang buckle.

Viewings can be arranged in Central London.
Brand: Omega
Model: Seamaster Chronostop Ref. ST145.007
Movement: manual-winding Cal. 865
Functions: sixty-second fly-back chronograph, hours, minutes
Features: unrestored Dial, tachymeter Scale
Case: 41 mm stainless steel
Crystal: plexiglass
Bracelet: suede taupe strap
Year: 1971
Box & papers: original box and papers from purchase
This rare, vintage Omega Seamaster Chronostop has an unrestored dial. The case has been lightly polished once since new and is in exceptional condition. The watch is guaranteed for authenticity and comes with a two-year warranty from A Collected Man.

All of our pre-owned watches have undergone thorough mechanical inspections, including being ultrasonically cleaned, serviced and resealed if appropriate and tested for at least four days, to ensure they meet our highest timekeeping standards. Our pre-owned and vintage watches are covered by a full, or a limited twenty-four month warranty. For example, due to their age, some vintage watches should not be subjected to the same conditions as when they were new. Please see our Terms & Conditions for further information. 

All of our new watches are covered by the warranty from the original manufacturer. Please contact us for further information.

We offer worldwide delivery on all of our watches.

If ordering from the UK or Europe before 1 PM, your watch will be sent the same working day. The courier will depend on the value of the watch, with all watches delivered the next working day.

If ordering from outside Europe, delivery will depend on choice of courier and destination. 

You can cancel your order without giving any reason, within 14 days from the day the watch has been delivered to you.