The Rolex Datejust 1603 is fitted with a steel engine turn bezel. This specific model has a  'Non-Luminous Silver Pie Pan Linen Dial'. Powered by the automatic 1570 this watches serial dates it to 1973.

Information:

Serial: 3,230,XXX

Year: 1973

Case Reference: 1603

Dial: Non-Luminous Silver Pie Pan Linen Dial

Case: 36mm - Stainless steel

Bezel: Steel Engine Turn Bezel

Bracelet: 6251H Folded Jubilee Bracelet –  55 Endlinks - Stainless Steel

Case back: 1601 inner stamp

Movement: 1570 - Running (-9s/d 265 Amp) - Automatic - No service history

Glass: Plexiglass

Accessories: No box or papers - Watch only

Lug Width: 20mm

Functions: Hours, Minutes, Second, Date

Bracelet size: 7.25”

Condition:

Case has moderate wear with no small marks and micro wear. Bracelet has a decent amount of stretch but has light normal micro wear. Dial and hands have little to no wear. Crystal has light scratches under a loupe. Watch is running (-9s/d 265 Amp).