The Rare Omega Seamaster Chronomètre Automatic Ref. OT 2520
The Omega Seamaster Chronomètre Automatic Ref. OT 2520 is an exceptionally rare and collectible watch, especially among vintage Omega enthusiasts. Here's a detailed breakdown of what makes this reference special: Omega Seamaster Chronomètre Ref. OT 2520 — Overview Reference : OT 2520 Case : Solid 18k yellow gold , 34.5mm diameter Movement : Caliber 352 RG , automatic bumper rotor, chronometer-rated Dial : Typically features a silver or champagne dial , applied gold indices, and dauphine hands Date : No date — time only Production period : Early 1950s Water resistance : As part of the Seamaster line, it had moderate water resistance for its time, though not a diver Movement: Cal. 352 RG (Chronomètre Grade) The "RG" designation : Refers to a regulator-type fine adjustment (rare and high-end) Bumper automatic : Rotor oscillates with a "bumping" action — an early form of automatic winding Chronometer-certified : Indicates superi...