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Gruen Precision 510 RSS Day / Night Jump Hour Markers

Name: Gruen Precision 510 RSS Day / Night Jump Hour Markers
Brand: Gruen
Price: 921.00 USD
Availability: InStock

$921.00

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This vintage Gruen Precision 510 RSS boasts an exceptionally rare and captivating complication with its “day/night” hour markers. Housed within the applied, polished indices is a mechanism that causes the inlays to change color from a light green to black, offering a unique visual indicator for the time of day. This innovative feature is displayed on a clean, silver-toned dial with a subtle radial finish, complemented by classic luminous-filled dauphine hands and a slim, sweeping seconds hand. The watch’s polished, round stainless steel case is defined by its sharp, straight lugs, embodying a clean mid-century aesthetic. Marked with “17 JEWELS” above the 6 o’clock position, this timepiece is a remarkable example of Gruen’s ingenuity and distinctive design.

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General

Brand	Gruen
Model Line	Precision
Manufactured	Switzerland
Department	Men
Dial Color	Silver

Case

Case Shape	Round
Bezel	Fixed
Case Material	Stainless Steel
Case Width	34mm
Case Height	42mm

Strap / Bracelet

Lug Width	18mm
Strap Material	Buttero Leather
Strap Color	Tan
Clasp	Buckle
Max Wrist Size	8.5"

Movement

Movement	Manual Wind
Caliber	Gruen N510CA
Accuracy	>15 seconds The movement showed a daily accuracy deviation ranging from 0 to 15 seconds across six positions.

Extras

Warranty Every watch sold by Ottuhr comes with a 1-year mechanical warranty. Select pieces may also include additional guarantees or extended coverage.	1-Year Ottuhr Warranty
Original Box	No
Original Papers	No

Technical Condition

Timing: The watch has been measured with a timegrapher at six different positions. The rate, amplitude, and beat error are within acceptable ranges.

Functions: All functions including the crown winding, time setting, etc are working as expected.

‍Integrity: The movement shows no signs of damage, rust, or corrosion, with all components appearing clean and well-maintained.

Authenticity / Warranty

Authenticity: Each timepiece is evaluated and authenticated in-house. This watch is guaranteed to be correct to its manufacturer and time period.

Warranty: This timepiece includes a 1-year mechanical warranty, activated upon the date of purchase.

Shipping & Returns

Shipping: This timepeice includes complimentary insured shipping within all 50 states.

Returns: If, for any reason, you are not entirely satisfied with your purchase, you may return the product for a full refund within 30 days from the date you received or signed for the item.

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