It is made for a 36mm men's Rolex Datejust Oyster watch band which has 19mm or 20mm lugs. It will also fit your 40mm Submariner, GMT, Daytona, Yatchmaster, Explorer and others.
Rolex Submariner Link Oyster Watch Band
Rolex Submariner 18K YG Tropical Dial Yellow Submarine-er
Rolex Submariner Date 18k Yellow Gold Tropical Dial ref 16808
Rolex Submariner 16808 40mm 18K Yellow Gold Blue Dial 1987 2 Year WTY #510-1
Vintage Rolex 40MM Solid 18K Yellow Gold Black Submariner Date Ref 16808 1984 –
Vintage Rolex 40MM Solid 18K Yellow Gold Black Submariner Date Ref 16808 1984 –
Model Number: 16808. Series: Submariner. (How many screws in bracelet if Rolex): 5 Pins. Case Width: 40mm. Band Material: 18K Yellow Gold. Year: 1981.
Rolex Submariner 16808 18K Yellow Gold 40mm Watch Blue Bezel & Dial (1981)
Rolex Submariner Date Watches, ref 1680/8, Rare Early Yellow Gold Model
Rolex Submariner 16808 18K Yellow Gold Black GILT NIPPLE DIAL VERY RAR
Rolex 16808 Submariner Black Nipple Dial 18K / Yellow Gold Bracelet EXCELLENT (28825)