Rolex. A rare stainless steel automatic chronograph bracelet watch with R serial number, 200 unit bezel and inverted 6 four line dial
Model: Cosmograph Daytona 'Zenith Inverted 6'
Reference: 16520
Date: Circa 1988
Movement: 31-jewel Cal.4030 automatic, adjusted to 5 positions and temperature, No.19008, recently serviced
Dial: Black, applied luminous filled baton hour markers, white outer 1/5th second divisions, silvered bordered subsidiary dials at 3, 6 and 9 for seconds, 30 minute and 12 hour recording, pointed baton hands with black and luminous inserts, centre chronograph hand
Case: Brushed and polished tonneau form, screw down back, inside caseback stamped 16500, fixed bezel with tachymetre scale, shouldered crown flanked by twin screw down chronograph pushers, No.R816659
Strap/Bracelet: Fitted steel 78360 Oyster link
Buckle/Clasp: Signed folding clasp, stamped 02
Signed: Case, dial & movement
Size: 38mm
Accompaniments: Rolex box, International Service Guarantee card dated February 2020, swing tag, brochures
Footnotes:
The present Rolex Daytona 16520 contains the much celebrated calibre 4030 based on the Zenith El Primero movement. As the first automatic in the Rolex Daytona range the enthusiasm for this model persists today and is only growing as watch collectors compete to complete their Daytona collections.

The so-called 'inverted 6' dials were only in production for a very limited amount of time, where the Arabic marker at 6 on the 12 hour recording subsidiary dial appears to be upside down, adding to the interest of the watch.