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Sinn Watch 140 St Leather

Sinn Sinn

140.020 Leather Strap

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Sinn Watch 140 St. 140.020 Leather

Known as their space chronograph, the Sinn 140 St watch is one of the brand’s most illustrious models that has gone down in both watchmaking and space flight history. German physicist and astronaut Reinhard Furrer wore one of the 140 models during the D-1 Spacelab mission in 1985, demonstrating that not only could automatic watches function in a weightless environment but that Sinn watches had mastered the art of reliable and accurate design.

Powered by the Sinn self winding mechanism SZ01, this Sinn 140 ST watch boasts a striking bead blasted stainless steel case that has been crafted with scratch resistant TEGIMENT technology and uses the Sinn D3-System on both the push pieces and crown. The matte black dial looks striking below the sapphire crystal glass with anti reflective treatment, and like most Sinn watches, the dial is adorned with indices, hands and numerals coated in luminescent material for easy legibility. To complete the look of the timepiece, a black leather strap and stainless steel buckle is added.





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Sinn Watch Packaging

Model No

140.020 Leather Strap




Instrument Chronograph



Case Width


Case Material


Dial Colour








Delivery & Returns


In addition to our 30 day returns policy all items purchased
from 7th October 2021 may now be returned for either an exchange or
full refund up until January 14th 2022. Standard terms apply.


We offer a Free UK next day delivery service on all orders over £75, in stock items will be dispatched same day when ordered before 4pm. All items are dispatched using a Royal Mail fully tracked and signed for delivery service.

Alternatively you may choose to upgrade the delivery of your items to a priority service by selecting Pre-9am Royal Mail express delivery in the checkout.


We offer worldwide shipping, charges will be calculated in the checkout for deliveries outside of the UK.

For more information about our delivery services available, contact us on 01335 453453 or email us at sales@cwsellors.com.



Sinn Watches

Sinn Watches, founded in 1961, have long been a big name in horology. Originally focussing on aviation, the company produced navigation clocks for the cockpits of planes, and this history is present in even modern day timepieces from the brand.

With popular models, including the Sinn Instrument and the Rally Chronograph, Sinn watches are stylish, contemporary, but also innovative in their manufacturing and movements. The watches collected by many for their accuracy in extremely adverse conditions such as high speed, high altitude, extreme cold and magnetic interference.

Price Match Request

Sinn Watch 140 St Leather - 140.020 Leather Strap (SN-342)

RRP £3,930.00

As the UK's leading luxury watch retailer, we are committed to providing our customers with the best possible prices across our branded products. Our Price Match Promise guarantees that if you find any of our jewellery or watches at a lower advertised price elsewhere, we will provide an instant price match for you.

To request a price match on an item listed on our website, simply fill out our instant price match form below.

Please Note; We only match authorised stockists and genuine products. The stockist should have the item in question ready to order and in stock. C W Sellors reserves the right to refuse any price match request without reason.

Take great care when obtaining quotes from unauthorised retailer, whilst many retailers may appear to be authorised stockists, this may not always be the case. Sourcing product through unauthorised stockists means that their products will be supplied without an official valid branded warranty and there is no way of determining the authenticity of the product.

Contact our dedicated team of watch specialists today on 01335 216 004 or email us at sales@cwsellors.com to get your instant price match today.

For full terms and conditions click here.

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