18000:

Generic inside caseback number

1802x: 

smooth bezel

18026 1980 so pt

1803x: 

fluted bezel

18039 1982 bo18038 1978 aq 18038 1979-2 aq

18039b:

Tridor

18039b 1980s aq 18039b 1985-2 aq 18039b 1987 aq

1804x: 

diamond bezel

18046 1980s aq pt 18049 1970s aq

1805x: 

ruby/ sapphire bezel [?]

18058 1982 so

1806x: 

ruby/ sapphire bezel [?]

18060 jr aq

1807x: 

bark bezel

18078 1980s aq 18078 1982 aq 18078 1980-2 aq

1808x 

[likely non-existent, please prove otherwise]

1809x 

[likely non-existent, please prove otherwise]

1810x: 

bark + 10 diamond bezel

18108 1985 so

1811x: 

Moiré AKA ”Decor Gay Freres 8551′ bezel

1812x: 

[not yet encountered, platinum ?]

1813x: 

[not yet encountered]

1814x:

 Diamond / emerald bezel

Rolex Day-Date 18148

 

yet to be confirmed for SQ models

1815x:

[not yet encountered]

1816x:

baquette bezel

18168 1983 so

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