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Dial Width: 32 mm
Dial Height: 32 mm
|Movement: 17 jewels manual-wind
Case: stainless steel
Case Width: 36 mm without crown
Case Height: 44 mm with lugs
Case Thickness: 6 mm
Serial Number on Back: 510 RSS
Serial Number on Movement: N501SS
Bracelet Length: measures up to 8.5 in with case
This is an authentic Swiss-made GRUEN Airflight Precision Pilot Manual-Wind Watch with switching or jump hour-windows
This watch keeps good time & is in good working condition! Add this to your collection of vintage quality timepieces!
The photos presented below are of the actual item for sale. Kindly study them carefully because what you see is what you will get. We try our best to describe watches as accurately as we can that's why we present them visually & literally. In case we missed a few points, you are welcome to ask questions.
This vintage GRUEN Airflight Precision has unique switching or jump hour-windows that change mechanically at midnight/noon, to display 12-hour standard time or 24-hour military time.
The GRUEN Airflight was designed for pilots who need 24-hour reference for flight time. At noon, the windows switch to show a 24-hour time, at midnight the windows switch back to show 12-hour time. This feature is credited to a rotating disk underneath the main dial. The hours are displayed in alternating sphere/diamond-shaped windows.
EXTERNAL CONDITION: This watch is in *VERY GOOD condition (83-87%): The watch shows what might be considered normal wear by a careful owner who wore the watch regularly. Scratches are evident, but no nicks or dings. May have replacement parts. A sound, attractive presentation overall.
INTERNAL CONDITION: This watch is in *NEAR MINT condition (93-97%): working perfectly, keeping good time & needs nothing.
*condition descriptives mainly based on the Timezone Grading System
stainless steel case
satin white dial or face in PRISTINE condition as it has crisp markings & a flawless surface
black GRUEN symbol logo, GRUEN name logo & "PRECISION" at 12 o'clock
black "SWISS" at 6 o'clock
clearly-marked black grid
unique switching or jump hour-windows that change mechanically at midnight/noon, to display 12-hour standard time or 24-hour military time
At noon, the windows switch to show a 24-hour military time, at midnight the windows switch back to show 12-hour standard time. This feature is credited to a rotating disk underneath the main dial. The hours are displayed in sphere/diamond-shaped windows.
stainless steel crown
original GRUEN acrylic crystal: clear but has turned slightly yellow around edges due to age
new khaki/brown fabric safety military band, includes a safety belt which keeps the case in place & prevents it from slipping
new stainless steel clasp & loops
stainless steel case back
reverse side of case back embossed with serial numbers, "GRUEN WATCH CO", "SWITZERLAND" & "STAINLESS STEEL BACK"
Swiss-made GRUEN 17 jewels manual-wind movement with 31 hours of power-reserve or running time - cleaned, serviced & checked by our skilled technician
Observe how the jump hour window feature in the GRUEN Precision Airflight switches from military time to standard time... another milestone in horology! The watch featured is the same model but has hour markers in a different font style from the watch in this listing.