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Rolex - 3121 - Oyster - Precision - Mens
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Name3121
FamilyOyster
GradePrecision
GenderMens
MovementFHF 59 17J (Details)
Years in Production1944
Case Diameter (mm)30
MechanismManual
ChronometerNo
HackingNo
Date FunctionNo
QuicksetNo
ChronographNo
Power Reserve (Hours)40
Frequency (bph)18, 000
Jewel Count17
ShapeRound
Hour MarksArabic/Stick
Crown Position3 O'Clock
Crystal MaterialAcrylic
Band MaterialStainless Steel
Band ReplaceableYes


Mechanism:
Also known as the FF30. This is a Rolex modified ebauche movement made by Fontmelon (FHF). Likely only used in Rolex models for the Canadian market ca. 1935-1945 variants with sub- and sweep second signed with 59. Data 10.5''', Dm= 23.3mm, Do= 23.7mm; H= 4.2mm; 15/17 jewels; f = 18000 A/h; power reserve 40h; Balance staff U1317; Stem W1110; Mainspring / battery: Zf1389, 1.70 x 9.0 x 0.10 x 290mm; Hands: 1.40 x 0.70mm
Item created by: gdm on 2018-10-12 20:23:00. Last edited by gdm on 2018-10-12 20:24:02

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