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132  of these sold for an average price of: 2,735.382,735.38132 of these sold for an average price of: 2,735.38
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Rolex - 1550 - Date - Mens
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Name1550
FamilyDate
GenderMens
MovementRolex 1575 (Details)
Years in Production1973
Case Diameter (mm)34
MechanismAutomatic
ChronometerYes
HackingYes
Date FunctionYes
QuicksetNo
Power Reserve (Hours)42
Frequency (bph)19, 800
Jewel Count25
Second HandSweep
Case MaterialStainless Steel
ShapeRound
Bezel MaterialStainless Steel
Date Position3 O'Clock
Crown Position3 O'Clock
Crystal MaterialAcrylic
Band TypeBracelet
Band MaterialGold 18K Yellow
Band ReplaceableYes


Notes: This is an interesting 34mm Date model from the 1970s. It is made in gold-plated stainless steel with a smooth polished bezel (also made in gold-plated stainless steel). It comes with a matching gold-plated stainless steel bracelet (3-link ). Dial faces run the gamut including white, black and champagne. The hour marks are typically index but Roman marks are also available. It is one of the rare post-war gold-plated models. Far more often Rolex uses stainless steel, solid gold, or a mix where some parts are stainless and some gold. This is one of the only models made all in gold-plated stainless.
Mechanism:
The 1575 is the date version of the 1570. Like many rolex movements the date version will be stamped with the same number as the non-date version. Hence you will see "1570" stamped into most (if not all) 1575 movements. The sure fire way to tell the difference is the presence of the date wheel.

The 1570 movement superseded the 1560, but shared the vast majority of its elements, with a few notable improvements. The 1570 marked the third generation of the 1500 series. It comes with the balance assembly Rolex p/n 8106, again with a Breguet hairspring. However, it’s with a higher frequency of 19,800 bph, or 2.75Hz.

Similarly to its predecessor, Rolex also manufactured it as a date and GMT version, the 1575, which proved the perfect companion to the Explorer II released in 1971, as well as the GMT-Master and Datejust series. As with many of the date equipped mechanism made by Rolex, the number stamped into the metal is the NON-date version. Hence in the case of the 1575, the mechanism will be stamped "1570".

Although there is no Quickset mechanism, the 1500 calibers came with the cam and jewel system. This system was able to create an instantaneous date change at midnight, still used by Rolex today.
Family Notes: The Rolex "Date" family of watches are smaller and less expensive than their cousins, the "Datejust" family. Date watches are enclosed in 34mm cases, whereas Datejust models are in 36mm cases. Furthermore, the Date models use 19mm width straps while the larger Datejust models use 20mm straps.

Being the less expensive line, new features reach the Date family only after the Datejust watches have already adapted them. For example, the Datejust family received mechanisms with Quickset date capability years before the Date models did.
Item created by: gdm on 2019-03-01 10:30:21. Last edited by gdm on 2019-03-01 10:31:08

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