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Rolex - 4220 - Oyster Precision - Unisex
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Name4220
FamilyOyster Precision
GenderUnisex
MovementRolex 710 (Details)
Years in Production1940 - 1946
Case Diameter (mm)31
Lug Width17
MechanismManual
ChronometerNo
HackingNo
Date FunctionNo
QuicksetNo
Power Reserve (Hours)44
Frequency (bph)18, 000
Jewel Count15
Band ReplaceableNo


Notes: The 1940s Royal Precision. Appears to use Rolex's 15-jewel calibre 710 manual wind mechanism.
Mechanism:
The Rolex 710 is also known as the Gruen 827 and was in fact made by Aegler. It is one of the many movements derived from the Hunter 10 1/2.
Item created by: gdm on 2018-10-01 09:51:28. Last edited by gdm on 2018-10-01 10:13:18

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