Omega Speedmaster - Horology Deconstructed

High resolution, book format. Deconstruction Omega Speedmaster Professional Japanese Racing 3570.40, Chronograph by THE NAKED WATCHMAKER Images from www.thenakedwatchmaker.com All texts, photographs and illustrations are Copyright ©2018 The Naked Watchmaker Edition OM.1a Formatted for use on mobile telephones, laptops and tablets. All rights to this publication are reserved. It would be appreciated by the author that no part of this book may be reproduced, copied or transmitted in any form or by any means, electronic or mechanical, including photocopy, xerography and videography recording, with out the permission of The Naked Watchmaker. The Speedmaster is an example of an iconic design from one of the most well known of the established watch brands. Year manufactured 2004 (Limited Edition of 2004 pieces). Stainless steel case. Dimensions: 42mm diameter, 13mm thick, perspex glass. Luminova on hands and indexes. Caliber: manual wound chronograph movement 1861. Original Omega bracelet. Lug width: 20mm. The case back is secured using a key with 6 fingers. Screwed on case back, machine engraved then blackened text. Made exclusively for the Japanese market in 2004. 2004 pieces were made and delivered, but not individually numbered. They differ from the regular 3570.50 reference with special grey matte dial with red/ orange accents as well as orange hands for the chrono function. This watch is inspired from a rare grey Racing dial model delivered from 1969-1971 as well as the Speedmaster Mark II. The movement assembly is secured in the case by the outer anti-magnetic iron cover pushing down on the calibre when the case back is screwed in place Inner case back with references Centre of the anti-magnetic cap which holds the movement in place. The raised button pushes directly on the inner case back. Views of the movement from the open case back With the case back removed you can see the black rubber seal sitting in the case which is sandwiched between the case centre and case back, rendering the union water resistant. The watch removed from its case Encirlcing the movement is the movement ring which slides into the case centre. Profile view showing the wheels driving the chronograph seconds hand. A tachymeter scale around the rim of the watch case can be used to compute a speed based on travel time or measure distance based on speed. The spacings between the marks on the tachymeter dial are therefore proportional to 1/t where t is the elapsed time. The case bezel with Tachymetric scale Inside view of the case showing the screw held pushers tightened from the inside of the bezel The movement ring, set between the calibre and the case centre Profile of the movement showing the screw which holds in place the dial foot Dial recto-verso The dial washer holding the hour wheel securely in place. The calibre Omega 1861, engraved below the balance wheel The flat side head is an eccentric which allows the coupling clutch to be adjusted altering the penetration of gears The engraved bridge holding in place the chronograph and minute recording wheels The central screw holds in place the friction spring for the chronograph wheel, removing any slack between meshed teeth gears The controlling cam, replacing the traditional pillar wheel system The Incabloc shock protection system protecting the balance pivots The movement serial number The pin hooking onto the hammers which when moved releases the hammers to return the chronograph seconds and minute recorder wheel to zero The flat sided screw is adjusted to