Editorial
The Datejust 1601 is a 36mm steel Datejust produced from 1960 to 1977, covering the period when Rolex was still dialing in what the reference would become. It ran the caliber 1570 and offered genuine variety: matte dials, sigma dials with gold-tipped indices, and the occasional tropical conversion that now commands serious money.
The 1601 succeeded the 1600 in 1960 and ran through 1977, spanning some of the most interesting dial evolution in Rolex's catalog. Early examples came with matte dials and applied indices; sigma dials, marked with the Greek letter sigma flanking the "Swiss Made" text, appeared through the mid-1960s into the 1970s to indicate solid gold index tips rather than gold-capped steel ones. The caliber 1570 is a 26-jewel movement with a 19,800 bph beat rate, refined from the 1560 series and considered one of the more reliable workhorses of the era.
Fluted and smooth bezels were both available in steel, and the lug width ran 19mm throughout the reference's production.
Check the dial carefully: matte dials were refinished heavily during service in the 1970s and 1980s, and many survivors have lost their original surface texture or gained incorrect gilt printing. Sigma dials are a specific desirability tier, so confirm the sigma characters flanking "Swiss Made" are present and sharp, not smudged or retouched. The case lugs on 1601s are frequently over-polished; prefer examples where the lug chamfers are still crisp and the case lines square.
Bracelets are often mismatched, as original 19mm jubilee bracelets are hard to find in good condition; a period-correct 1601 bracelet with matching end links adds meaningful value. Tropical dials on this reference do exist, but they attract fakes and aggressive refinishes, so prefer examples with auction or specialist provenance.
