Vintage Omega Seamaster 600: What to Buy and What to Avoid

The Seamaster 600 belongs to Omega's manual-wind dress-watch output of the 1960s. Caliber 601 drives the no-date configuration, while caliber 611 accompanies the date display; both movements have 17 jewels in the watches examined. The absence or presence of a date is therefore a structural choice, not merely a dial variation.

At 34 mm or 35 mm excluding the crown, the case wears compactly and leaves the dial in control of the proportions. Applied baton indices and straight hands keep the silver surface legible, while a vertical brush produces a quieter effect than a sunburst finish. Manual winding also keeps the ownership routine direct: crown feel matters, and a gritty or slipping action requires mechanical attention rather than cosmetic explanation.

Dial preservation creates the largest spread. A clean silver sunburst or vertical-brushed dial retains crisp printing and uninterrupted texture; heavy reddish spotting, dense speckling and oxidation on the applied furniture move the watch into condition-led territory. Of the Seamaster 600s we have handled, a damaged dial has been harder to overlook than minor oxidation confined to the hands.

Steel is the safer case material when two examples have comparable dials. Gold plating gives warmer contrast with gold-tone indices, but wear-through cannot be reversed by ordinary polishing, and further polishing only removes more plating. Between a sharp steel case with an honest clean dial and a brighter plated case with softened lugs, take the steel watch. The intact hippocampus on the caseback supports the case assessment, but it does not rescue a compromised dial.

The worst recurring fault is dial damage. Broad reddish spotting across the surface is damage, not patina; dense, even speckling may look coherent, but it still carries a discount against an undamaged dial. Oxidation can also spread across the hands, applied indices and logo, while darkened lume may indicate age without proving that the hands and dial left the factory together.

Cases fail differently. Polishing softens the lug profile and weakens the caseback emblem, while gold plating thins first on exposed edges and cannot be rebuilt through routine service. A replacement crown or crystal can be practical, but neither should support an unqualified claim of originality. Movement condition is separate: timing figures describe performance during one test, not the date or quality of the last service, and without documentation the service history is unknown.