Mayfair Open Heart - Ref. 241121
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automatic watch movement
text and video instructions
Full watchmaker tool kit
We are here to help
The Mayfair collection is a series of modern, colour bursting and inspiring watches. The uniquely shaped cases are finished with exceptional attention to detail, comprising brushed surfaces and meticulously polished edges. The vibrant dials are finished with a sun-ray brushing, reflecting every ray of light, and a set of silver polished hands to match the cases.
For this open heart model, we took a cutter to the dial to reveal the beating heart of your movement. With its oval cut-out the spinning balance wheel is fully visible, in addition to the escapement lever and escape wheel as well as part of the gear train connected to your hands.
The Mayfair case is leaning towards a dress watch with its polished pillow shaped form, but retains key features of a toolwatch such as a scratch resistant sapphire crystal and a screw-down crown and case back to ensure water resistance. The Mayfair is powered by the NH-38A automatic watch movement with 41 hours power reserve, 24 jewel bearings and sweeping second hand.
Containing all parts, tools and instructions our kits are an ideal start into the world of horology. Learn more about the way a watch ticks, the origins of watchmaking and how to assemble your own automatic watch at home.
All our kits contain a detailed instruction booklet as well as access to our step-by-step video guides available on our homepage (click here for an example) to assist you throughout the assembly.
Our kits are available as Full watchmaking kits or as No tools variants:
- Full watchmaking starter kit includes watch components (case, dial, hands, movement, and strap), a full tool kit (watch hand levers and press, movement cushion, friction ball, cleanroom products, dust blower, Rodico, precision tweezers, table mat, screwdriver (pilot watches only), watchmaker’s loupe and headwire) and detailed instructions (printed booklet in each kit and access to our step-by-step video guides via our homepage)
- No tools kits include only the watch components and the instructions (we recommended to start with a full DIY kit to ensure you have all the right tools for your first assembly)
Safety notice: Please note that these kits are not toys and are unsuitable for children of any age. They contain small parts which can be swallowed as well as sharp tools. Please always handle the tools (especially tweezers) with utmost care and caution. Keep the ends away from your eyes, skin or any other person or animal.
Size
Width (Bezel)- 38mm
Lug to Lug - 47.0mm
Height - 11.8mm
Weight
85g (Leather strap)
Case
Stainless steel case with see-through exhibition case back, drilled lug holes and scratch resistant sapphire crystal
Dial
Sun-ray polished fume dial (open heart design) with applied hour markers (lume filled)
Hands
Silver polished hands (lume filled)
Movement
TMI(SEIKO) NH-38A automatic watch movement with 41 hours of power reserve and 24 jewel bearings
Strap - 20mm
Black FKM strap with deployment buckle (105/100mm)
Italian leather strap (120/80mm)
Italian leather strap - extra long (135/85mm)
Your watch components
A burst of colour
Highlight of the Mayfair Open Heart is our new Sunray brushed 28.5mm fume dial with a cut-out revealing balance wheel, escapement and hand gears completed by applied, silver polished indices (lume filled).
Exceptional Finishing
The 38mm stainless steel case (bezel measurement, 42mm incl. cushions) is finished with polished and brushed surfaces and is equipped with a sapphire crystal, see-through case back, and screw down crown.
NH-38JB Movement
This automatic watch movement is manufactured in Japan by TMI, a subsidiary of Seiko, and includes 24 jewel bearings, a power reserve of 41 hours, sweeping seconds hand and a skeletonized balance wheel.
FKM or Italian Leather
The Mayfair is available with a flexible, water resistant FKM strap with deployment buckle or a soft Italian leather strap available in two sizes (all straps are equipped with quick release spring bars).
Everything you need in one package
our watchmaking starter kits
Designed for you, our kits contain everything you need to build one of our watches at home including the full set of components above, a complete watchmaking tool kit and detailed step by step instructions (included as print version and with access to our online videos).
Shipping Information
Our kits are shipped from our London workshop with Royal Mail. We aim to send all orders within 1-2 business days. However, in exceptional circumstances it might take slightly longer to get your kit on the way.
There are no fees, taxes or other costs when buying from the UK.
International orders are shipped via UPS or a similar courier within 2-3 business days.
If you purchase from outside the UK or ship to an address outside the UK, you order will not include UK taxes.
Please note that customers will remain liable for local taxes and/or import duty for deliveries outside the UK. Import payments and process are handled by the courier company and we have no influence over this process. Incurred costs on your behalf are not refundable.
For more information, please review our shipping policy.
You can contact us through our contact page! We will be happy to assist you.