Rolex手錶5位數型號
開頭數字表示
Model numbers beginning with "1—-" = Gents watch
Model numbers beginning with "67—" = Ladies/Midsize watch
Model numbers beginning with "68—" = Midsize watch
Model numbers beginning with "69—" = Ladies watch
註:6開頭新錶已改為7字頭
最後一個號碼(或第五號)表示金屬使用:
0————-Steel (不銹鋼)
3————-Steel & yellow gold(半金或半紅)
4————-Steel & white gold
6————-Platinum(純白金)
8————-Yellow gold(白18k金)
9————-White gold(黃18K金)

Rolex機心型號
The first digit shows the category of movement fitted.
1——-Early movements (1950-1979 approx).
2——-Ladies movements.
3——-Gents movements.
4——-Chronograph movements (later models).
5——-Quartz Oyster movements.
6——-Quartz dress watch movements.

The second number emphasizes the age group of the movement.
0——–1st group.
1——–2nd group.
2——–3rd group.

The final 2 digits designate the functions and complications.
30——-No date mechanism fitted.(無日期)
35——-Date mechanism only fitted..(有日期)
55——-Day and date mechanism fitted..(有日期及星期)
75——-24 hour hand fitted (Explorer and GMT models).(24小時指針)
85——-Adjustable 24 hour hand fitted. (Explorer II and GMT Imodels).(可調整24小時指針)
ex: Explorer II 的機心編號為3185