Reference 2852 with a calibre 505 Chronometer movement.
The case is steel with a gold top. A layer of gold fused to the steel and much thicker than gold plate. The condition of your case is good. The medallion on the back is nice and sharp.
The dial is commonly known in these parts as a two tone dome waffle, yours has arrow markers which makes it particularly attractive. These dial types are very much saught after by collectors and yours is in very good shape.
Your movement looks to have some rotor issues as can be seen by the wear on the automatic winding rotor. A service by a watchmaker with experience and sympathy to vintage watches/Omega is recommended.
Value as is I would put around $1600-1700
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