Rolex Submariner Vintage Stainless Steel Ref. 5512 Matte 4-Line dial 1966-67

DETAILS
Manufacturer: Rolex
Model: GMT Master
Reference Number: 5512
Movement: Automatic
Condition: Good, wear consistent with use and age
Gender: Men’s/unisex
Time Period: 1966 - 1967 
Retail / Compare-At Price: n/a collector’s item
Our Best Price: $23,250

CALIBER
Movement: -
Caliber: 1560 - 1570
Jewels: 26 

CASE
Case Material: Stainless Steel
Case Diameter: 39.5 mm
Thickness: 14.4 mm
Waterproof: 330 ft. / 100 m.
Water Resistance: 10 ATM
Material Bezel: Bi-directional rotatable bezel
Glass: Acrylic tropic dome 19
Dial: Black dial matte with 4 lines
Dial Numerals: No numerals, white dot hour indices, minute divisions around the outer rim

BRACELET / STRAP
Bracelet color: Stainless Steel
Bracelet Material: Stainless Steel Oyster
Clasp: Fold-over
Clasp material: Stainless Steel

FUNCTIONS
Hours, minutes, center sweep seconds, 48-hour power reserve

OTHERS
Silver Mercedes hour hand, spade minutes hand, stick seconds hand 
Tropical dial
Bi-directional rotatable 1-hour graduated bezel with Arabic numerals every 10 minutes
Stainless steel recessed screw-down crown guards
Stainless steel screw down solid case back
Nice patina four-liner, submariner first line, feet first maxi-dial
Chronometer-rated movement, certified by COSC
In 1958, Rolex introduced their latest dive watch with the Submariner 5512 model with one of the longest-running Rolex sports watch references to date. It was then discontinued in 1978.
This reference was to replace the preceding Submariner 5510 and Submariner 6538 and is the ancestor of today’s Submariner 116610LN and 114060 (no date).  
Among other things, the biggest change the ref. 5512 brought to the Submariner collection was the inclusion of crown guards.
Incomplete (no box, no papers)